THE OLD SCHOOLHOUSE, PORTERSTOWN ROAD, , 15 Archaeological Impact Assessment

Client: Hughes Planning and Development Consultants

Licence No: n/a

Archaeologist: Aidan O’Connell

Author: Bart Korfanty & Aidan O’Connell

Report Date: 27 January 2021

Our Ref: 2021_01

THE OLD SCHOOLHOUSE, PORTERSTOWN ROAD, CLONSILLA,

SITE NAME The Old Schoolhouse

CLIENT Hughes Planning and Development consultants

INVESTIGATION TYPE Archaeological Impact Assessment

LICENCE NO N/A

PLANNING REF N/A

TOWNLAND Kellystown

IRISH TRANSVERSE MERCATOR 705752, 737894

RMP NO N/A

RPS NO N/A

ARCHAEOLOGICAL CONSULTANT Archer Heritage Planning Ltd.

ARCHAEOLOGIST Aidan O’Connell

DATE OF ISSUE 27th January 2021

JOB REF. 2021_01

Archer Heritage Planning Ltd. The Old Schoolhouse, Clonsilla, Dublin 15 Archaeological Assessment

CONTENTS

CONTENTS ...... I SUMMARY ...... III 1. INTRODUCTION ...... 1 1.2 SITE DESCRIPTION ...... 1 2. METHOD STATEMENT ...... 2 3. ARCHAEOLOGICAL BACKGROUND ...... 2 3.1 BRIEF ARCHAEOLOGICAL & HISTORICAL BACKGROUND ...... 2 3.2 RECORD OF MONUMENTS & PLACES ...... 4 3.3 TOPOGRAPHICAL FILES...... 4 3.4 CARTOGRAPHIC SOURCES ...... 4 3.5 AERIAL PHOTOGRAPHY ...... 5 3.6 PREVIOUS ARCHAEOLOGICAL EXCAVATIONS ...... 5 3.7 RECORD OF PROTECTED STRUCTURES ...... 6 4. SITE INSPECTION ...... 6 5. DESCRIPTION OF ARCHAEOLOGICAL POTENTIAL ...... 7 6. IMPACTS & RECOMENDATIONS ...... 7 7. REFERENCES ...... 8 7.1 BIBLIOGRAPHY ...... 8 7.2 WEB REFERENCES ...... 8 APPENDIX 1: RECORD OF MONUMENTS AND PLACES ...... 9 APPENDIX 2: PREVIOUS ARCHAEOLOGICAL EXCAVATIONS ...... 11 APPENDIX 3: RECORD OF PROTECTED STRUCTURES ...... 12

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List of Tables Table 1: Cartographic sources relating to the site Table 2: Aerial Photographs

List of Figures Figure 1: Location of site and surrounding RMP’s Figure 2: Proposed site layout Figure 3: Extract from OSI 1st edition OS map Figure 4: Extract from OSI 25” map Figure 5: Aerial view of site; Digital Globe 2011-2013 Figure 6: Aerial view of site (ii); Google Earth Jan 2020

List of Plates Plate 1: View of canal embankment at south of site from south Plate 2: Eastern (front) elevation of Porterstown NS Plate 3: Western (rear) elevation of Porterstown NS Plate 4: Porterstown NS from north Plate 5: View of schoolyard from south Plate 6: Eastern portion of site from west Plate 7: View of site from western side of Porterstown NS Plate 8: View from western end of subject site

ii Archer Heritage Planning Ltd. The Old Schoolhouse, Clonsilla, Dublin 15 Archaeological Assessment

SUMMARY

A desk-based study and field survey was carried out on a site at Porterstown Road, Clonsilla, Dublin 15. The site is located directly north of and on the embankment of the . It will be subject to a future application for a residential development under the SHD process. This Archaeological Impact Assessment report sought to identify and describe known and potential archaeological or cultural heritage constraints within and/or immediately adjacent to the site. The following factors were identified in the course of desktop study: o The site is situated on a large embankment on the north bank of the Royal Canal. o There are no Recorded Monuments within the site o No potential new archaeological features were recorded in cartographic sources. o No potential new archaeological features were recorded in aerial photos of the subject site. o The Old Schoolhouse, located at the east of the site is a Protected Structure o No archaeological excavations have been undertaken previously within the subject site. o No stray finds from the NMI topographical files can be directly attributed to the subject site. o No areas of archaeological potential were noted during the walkover survey. There is low potential that buried archaeological remains will be adversely impacted by the proposed development.

Recommendation 1 It is recommended that should building works proceed, any groundworks should be monitored by a suitably qualified archaeologist.

Recommendation 2 It is recommended that should building works proceed, a building survey should be undertaken at RPS 700, Clonsilla Schoolhouse in order to record the existing structure in advance of any modifications/refurbishments.

NOTE: All conclusions and recommendations expressed in this report are subject to the approval of The Department of Housing, Local Government and Heritage (DHLGH) and the relevant local authorities. As the statutory body responsible for the protection of Ireland’s archaeological and cultural heritage resource, the DHLGH may issue alternative or additional recommendations.

Revision Status Date Prepared by Reviewed by Approved by 1 Final 27 Jan 2021 BK & AOC (Archer) LC (Archer) CMG

iii Archer Heritage Planning Ltd. The Old Schoolhouse, Clonsilla, Dublin 15 Archaeological Assessment

1. INTRODUCTION

This archaeological assessment undertaken on a site at Porterstown Road, Clonsilla, Dublin 15 (ITM 705752, 737894; Figure 1) has been prepared by Archer Heritage Planning Ltd for Osh Ventures Ltd. A desk-based study and site inspection were undertaken in December 2020 by Aidan O’ Connell of Archer Heritage Planning Ltd aiming to identify and describe known and potential archaeological and cultural heritage constraints within the site and offer recommendations for the mitigation of such impacts.

1.2 Site Description

A Protected Structure (Former Clonsilla School/Old Porterstown National School; RPS 500) is situated at the east of the subject site. Porterstown Road forms the eastern site boundary and existing residential developments (‘The Village’ & Lambourn Park) are situated to the north.

The proposed development consists of the following: The construction of a residential development of 198 no. Build to Rent apartment units (120 no. one beds, 59 no. two beds and 19 no. three beds) in 8 no. blocks (ranging in height from four/five to seven storeys in height) as follows:  Block A containing a total of 22 no. apartments (16 no. 1 bed units, 5 no. 2 bed units and 1 no. three bed units) measuring 4 to 5 storeys in height with all apartments provided with private balconies/terraces.  Block B containing a total of 21 no. apartments (11 no. 1 bed units, 6 no. 2 bed units and 4 no. three bed units) measuring 5 storeys in height with all apartments provided with private balconies/terraces.  Block C containing a total of 27 no. apartments (15 no. 1 bed units, 8 no. 2 bed units and 4 no. three bed units) measuring 6 storeys in height with all apartments provided with private balconies/terraces.  Block D containing a total of 31 no. apartments (15 no. 1 bed units, 10 no. 2 bed units and 6 no. three bed units) measuring 7 storeys in height with all apartments provided with private balconies/terraces.  Block E containing a total of 37 no. apartments comprising (27 no. 1 bed units and 10 no. 2 bed units) measuring 7 storeys in height with all apartments provided with private balconies/terraces.  Block F containing a total of 31 no. apartments comprising (23 no. 1 bed units and 8 no. 2 bed units) being 6 storeys in height with all apartments provided with private balconies/terraces.  Block G containing a total of 11 no. apartments comprising (3 no. 1 bed units and 8 no. 2 bed units) measuring 5 to 6 storeys in height with all apartments provided with private

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balconies/terraces.  Block H containing a total of 18 no. apartments comprising (10 no. 1 bed units, 4 no. 2 bed units and 4 no. three bed units) measuring 4 to 5 storeys in height with all apartments provided with private balconies/terraces and internal/external refurbishment and alterations to the existing Protected Structure (Former Clonsilla School - RPS No. 700) to allow for its change of use and conversion to provide a management office with ancillary community use for residents and the construction of 1 no. childcare facility located within the ground and first floor levels of Block G. A total of 100 no. car parking spaces are proposed including 96 no. spaces serving the proposed apartments, (32 no. standard spaces at undercroft level at Blocks B to H, 58 no. standard spaces at surface level at Blocks A, C, D, E, F and G and 6 no. disabled spaces at undercroft level at Blocks B, D and F), 3 no. spaces for the staff of the proposed childcare facility at undercroft level at Bock G and 1 car-share space at surface level at the Old Schoolhouse. A total of 392 no. bicycle parking spaces are proposed, including 312 no. spaces at undercroft levels and 80 no. spaces at surface level. Planning permission is also sought for landscaping and infrastructural works, foul and surface water drainage, bin storage, ESB substation, open space areas including playground, boundary treatments, internal roads and footpaths (including a Greenway Cycle Path), upgrade to existing access from Porterstown Road and all associated site works to facilitate the development."

2. METHOD STATEMENT

The following sources were consulted in the preparation of this report: o Record of Monuments and Places (RMP)/ Sites and Monuments Record1 o Aerial photography o Historical maps o Documentary research o Relevant on-line databases (e.g. Excavation Bulletin; NRA Archaeological Database). o Development Plan 2017-23 (incl. Record of Protected Structures)

3. ARCHAEOLOGICAL BACKGROUND

3.1 Brief archaeological & historical background Research into a site or areas place name (or toponym) can provide information relating to an area’s heritage or previous land use. Many townland names were anglicised by the time the Ordnance Survey (OS) began in the 1830s and when townland names were standardised in the Townland Index (1851).

1 Archive Unit National Monuments Service, Department of Culture, Heritage and the Gaeltacht

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Clonsilla translates to Cluain Saileach in Irish which means meadow/ pasture (Cluain) of the willows (Sail). (www.loganim.ie).

There are limited prehistoric monuments from the surrounding area, however the majority of surviving sites are early medieval in date (c.AD 500–1000), comprising settlements and church sites, which suggest a well-populated and managed landscape during the early medieval period. The origin and development of any ecclesiastical site at Clonsilla before the medieval period is unclear and is often confused with the remains at , which disappeared before the sixteenth century, but appeared to have been the most important church within the parish of Clonsilla. A church dedicated or attributed to St Mochta or Mochtae (in Latin sources Maucteus or Mauchteus) is traditionally believed to be the site (DU013-019001) currently located in the grounds of Coolmine House (Ronan 1940, 188), through late medieval references to the ‘White Chapel of St Machutus [Mochta]’.

Henry II confirmed the lands of the of to Hugh de Tyrell, making him Baron of Castleknock. De Tyrell had been previously granted the lands in 1177 by Hugh de Lacy (Ronan 1940). De Tyrell constructed a castle at Castleknock, and the area was further castellated in 1210 with the erection of by Geoffrey Luttrell. St Mary’s Abbey Dublin acquired lands at Coolmine from Henry II in 1174, with further acquisitions of the Benedictine Priory of St Brigit in Clonsilla in 1486. The sale included the church, its grange, five acres in the village of Clonsilla, five acres of land and meadow around the church, and a watermill on the Liffey; (Ó Conbhuí 1962, 21-86). These remained in the possession of the abbey until 1539, when the church and its holdings were confiscated as part of the wider dissolution of the monasteries under Henry VIII (Ball 1902-20).

The Old Schoolhouse The origins of the Old Schoolhouse, Clonsilla date back to 1852 when the local priest, Fr. Dungan, approached Lord Annaly, the owner of Luttrellstown Castle and asked him to donate a site for his planned school. Lord Annally rebuffed the cleric, who is reputed to have replied "I will build a school in spite of you and it will be visible no matter where you go”. The distinctive gable-fronted detached building was subsequently constructed by James and Charles Kennedy, licensed vintners based in Capel Street, Dublin. The school was always referred to by the local community as 'The School of

Spite'. It opened on 16th January 1854 for 66 girls and 58 boys. Porterstown National School closed down in 19632. The following account of the school is recorded in the Schools Collection (1937-9) at the National Folklore Collection, UCD: We are living in the place where the old school was. Lord Annally lived in Luttrellstown at that time. He was asked for some ground to build a Catholic school. He would not give the ground,

2 http://www.askaboutireland.ie/reading-room/history-heritage/architecture/architecture-in-fingal-du/old-porterstown-national-/

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and a man named Kennedy hearing this bought a portion of land and built a big high school (the present 'Clonsilla school') so as Lord Annally would be able to see the Catholic school from his window every morning. Mr Kennedy who was a wine merchant in Capel Street, knew that this would punish Lord Annally, and so it did, because not long after the school was complete, on seeing the height of it and knowing that the Catholic religion was taught there, Lord Annally died. The school is about one hundred years old. The old school was a Protestant one. Both Catholic and Protestant children went there, and that is the reason the priests wanted a Catholic school3.

3.2 Record of Monuments & Places The Record of Monuments and Places (RMP) is a statutory inventory of archaeological sites protected under the National Monuments Acts 1930-2004 (Section 12, 1994 Act), compiled and maintained by the Archaeological Survey of Ireland (ASI). The inventory concentrates on pre-1700 AD sites and is based on a previous inventory known as the Sites and Monuments Record (SMR) which does not have legal protection or status (see www.archaeology.ie). There are no recorded monuments located within the application area. The closest archaeological sites consist of 3 conjoined prehistoric ring barrows at Kellystown at the west of the site (RMP DU013-018) and the Church and Graveyard complex at St Mary’s C of I (RMP 013-017). Neither will be impacted by the current proposal. Adjacent RMP sites are listed in full in Appendix 1.

3.3 Topographical Files

The National Museum of Ireland Topographical Files is the national archive of all known antiquities recorded by the National Museum listed by county and townland/street. These files relate primarily to artefacts but also include references to monuments and contain a unique archive of records of previous archaeological excavations. The Museum files present an accurate catalogue of objects reported to that institution from 19284. No finds can be directly attributed to the subject site. A polished stone axehead (1979:104) is recorded nearby at Lambourn Road and is indicative of Neolithic activity.

3.4 Cartographic Sources Analysis of historic mapping can show human impact on landscape over a prolonged period. Large collections of historical maps (pre- and early Ordnance Survey maps as well as estate or private maps)

3 https://www.duchas.ie/en/cbes/4498593/4385194/4509674 4 The NMI Topographical Files search was undertaken by the Irish Antiquities Division of the NMI on behalf of Archer Heritage and is gratefully acknowledged,

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are held at the Glucksman Map Library, Trinity College and other sources (UCD Library, Ordnance Survey Ireland, local libraries and published material). The development of the site and its vicinity recorded through the eighteenth to twentieth century cartography are described in Table 1 below (Figure 3). No features of archaeological potential were noted within the subject site on the consulted cartographic sources.

Map Date Description The site is shown in its current layout on the northern bank of the Royal Canal. The boundary between Kellystown and Porterstown townlands Historic 6inch 1844 can be seen at the east of the site. Lands to the north are depicted as agricultural land. Clonsilla School is depicted at the east of the site. The railway line south Historic 25inch 1906-9 of the royal Canal has been built. No other changes Table 1: Cartographic sources relating to the site

3.5 Aerial photography Aerial photography (or other forms of remote sensing) may reveal certain archaeological features or sites (earthworks, crop marks, soil marks) that for many reasons may not be appreciated at ground level. Online orthostatic photographs of the site were examined (Ordnance Survey Ireland 1995, 2000 & 2005; Google Maps 2018). No potential new archaeological features were noted on the consulted sources (Table 2).

Aerial Photograph Date Description OSi 1995 Black and white photography. Shown in its current layout OSi 2000 No change OSi 2005 No change Digital Globe 2005-13 No change Google Earth Pro 2018 No change Table 2: Aerial Photographs

3.6 Previous Archaeological Excavations

The Excavation Bulletin is a database of summary accounts of archaeological excavations in Ireland and Northern Ireland from 1970 to 2020. Summaries relating to archaeological excavations undertaken by the National Roads Authority are also available on-line and were consulted for any adjacent sites. Reports on licensed archaeological works are also held by the Archive Unit of the National Monuments Section. The results of these archaeological investigations are listed in Appendix 3. There were no previous archaeological excavations within the site. There are a small number of excavations within the wider area around the site. These were undertaken in advance of development works. Excavations undertaken at St. Mary’s Church (04E0033) identified human skeletal remains dating to the 19thC

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onwards. Also, excavations undertaken at RMP DU013-018 (ring barrow, Kellystown) confirmed the presence of an embanked ringditch/ring barrow at this site.

3.7 Record of Protected Structures

Local Authorities have a statutory responsibility to safeguard architectural heritage in accordance with Part IV of the Planning and Development Act 2000. Under S.51 (1), a County Council must compile a Record of Protected Structures (RPS), which lists all structures that are of special architectural, historical, archaeological, artistic, cultural, scientific, social or technical interest. The protection, unless otherwise stated, includes the exterior and interior of the structure, lands lying within its curtilage (boundary), other structures and their interiors within the curtilage, plus all fixtures and fittings that form part of the interior or exterior of any of these structures. Buildings can be added to, or deleted from the RPS at any time, though generally this occurs when the county development plan is being reviewed. The National Inventory of Architectural Heritage (NIAH) was established on a statutory basis under the provisions of the Architectural Heritage (National Inventory) and Historic Monuments (Miscellaneous Provisions) Act 1999. Its purpose is to identify, record, and evaluate the post-1700 architectural heritage of Ireland, uniformly and consistently as an aid in the protection and conservation of the built heritage. It is intended to provide a basis for recommendations of the Minister for Culture, Heritage and the Gaeltacht to Local Authorities for the inclusion of particular structures in Records of Protected Structures (RPS). The Old Schoolhouse is a Protected Structure (RPS 700; NIAH 11361001). A conservation architect has been appointed to give specific advice on the appropriate treatment of this structure in the course of conservation and refurbishment works as set out in the project proposal. Additional Protected Structures in the surrounding area consist of railway structures and bridges.

4. SITE INSPECTION

The site was visited on 17th December 2020 in dry, overcast conditions (Plates 1–8). It is located on the north bank of the Royal Canal, bounded to the south by the canal, to the north by residential housing and to the east by Porterstown Road. The area comprises a narrow elongated plot situated on the canal embankment. The embankment is c. 4-5m high above the level of the adjacent towpath on the northern canal bank (Plate 1). The remains of Porterstown National School (RPS 700) are prominent at the east of the subject site and visible from the north, east and west. This consists of distinctive two-storey above basement gable fronted building, currently unoccupied, inaccessible and fenced off from the remainder of the site (Plates 2-4). The schoolyard appears to have been enclosed by a stone wall abutting the rear of the building (Plate 5). The remainder of the site has extensive areas of bramble and scrub overgrowth

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with some pockets of open fallow land (Plates 6-8). No potential archaeological features were noted within the subject site in the course of the site inspection.

5. DESCRIPTION OF ARCHAEOLOGICAL POTENTIAL

This Archaeological Impact Assessment report sought to identify and describe known and potential archaeological or cultural heritage constraints within and/or immediately adjacent to the site. The following factors were identified in the course of desktop study: o The site is situated on a large embankment on the north bank of the Royal Canal. o There are no Recorded Monuments within the site o No potential new archaeological features were recorded in cartographic sources. o No potential new archaeological features were recorded in aerial photos of the subject site. o The Old Schoolhouse, located at the east of the site is a Protected Structure. o No archaeological excavations have been undertaken previously within the subject site. o No stray finds from the NMI topographical files can be directly attributed to the subject site. o No areas of archaeological potential were noted during the walkover survey.

6. IMPACTS & RECOMENDATIONS

There is low potential that buried archaeological remains will be adversely impacted by the proposed development.

Recommendation 1 It is recommended that should building works proceed, any groundworks should be monitored by a suitably qualified archaeologist.

Recommendation 2 It is recommended that should building works proceed, a building survey should be undertaken at RPS 700, Clonsilla Schoolhouse in order to record the existing structure in advance of any modifications/refurbishments.

NOTE: All conclusions and recommendations expressed in this report are subject to the approval of The Department of Housing, Local Government and Heritage (DHLGH) and the relevant local authorities. As the statutory body responsible for the protection of Ireland’s archaeological and cultural heritage resource, the DHLGH may issue alternative or additional recommendations.

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7. REFERENCES

7.1 Bibliography Ball, FE 1905 A History of the . Vol. 4. Dublin: Alexander Thom & Co. Ltd. Ó Conbhuí, C 1962 ‘The Lands of St. Mary's Abbey, Dublin’. Proceedings of the Royal Irish Academy. 62C pp. 21-86. Ronan, MV 1940 ‘Mulhuddard and Cloghran-Hiddert’. The Journal of the Royal Society of Antiquaries of Ireland, Vol. 10 (4), pp. 182-193.

7.2 Web references Online Excavations bulletin www.excavations.ie [accessed January 2021] Aerial Photography http://map.geohive.ie/mapviewer.html [accessed January 2021] Online Excavations bulletin www.excavations.ie [accessed January 2021] Online Archaeological Survey of Ireland www.archaeology.ie [accessed January 2021] https://fingalcoco.maps.arcgis.com/apps/webappviewer/index.html?id=cdba99d434874d8697b7451ea2 5bdba1 [accessed January 2021]

Aidan O’Connell 27th January 2021

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APPENDIX 1: RECORD OF MONUMENTS AND PLACES

SMR No Class Townland ITM Distance to site DU013-017001- Church CLONSILLA 704899, 738286 The located on higher ground to the north of a circular graveyard was built in 1846. It reputedly occupies the site of an earlier medieval parish church (Ball 1906, 20-21). There is no visible trace of earlier church. Compiled by Geraldine Stout; Updated by Christine Baker; Date of upload: 19 January 2015. References: o Ball, E.F. 1906 (Reprint 1979) A history of the County Dublin, 6 vols. Dublin. Gill and Macmillan. DU013-017002- Graveyard CLONSILLA 704888, 738262 St Mary's church is located on higher ground to the north of a circular graveyard. To rear of the church is the White mausoleum. Between it and the church a parish centre has been erected. The site was subject to archaeological excavation (Licence no. 04E0033) prior to the construction of a parish centre extending north from St Mary’s church. A total of 32 burials were uncovered of which 30 were excavated, two being left under the crypt (built 1802) boundary wall. The majority of burials appeared to date from the 19th century to mid 20th century (Keith 2004). Graveyard is in use. Compiled by Geraldine Stout; Updated by Christine Baker; Date of upload: 19 January 2015. References: o Keith, S. 2004 Archaeological excavation report at St Mary's Church Clonsilla, Dublin 15 (Licence no. 04E0033). Unpublished report submitted to the National Monuments Service, Department of Arts, Heritage and the Gaeltacht DU013-017003- Graveslab CLONSILLA 704898, 738281 There is a tombstone in the graveyard of the 19th-century Church of Ireland erected to Frances Lady Newcomen of Sutton d. 1687 (Ball 1906, 20-21). Located south of church aligned the graveslab is recumbent within a tarmacked area. Extensive cracked the southwest corner of the has been replaced by concrete. Stone is flaking. Lettering hard to make out but for the moss. Compiled by Geraldine Stout; Updated by Christine Baker; Date of upload: 19 January 2015. References: o Ball, E.F. 1906 (Reprint 1979) A history of the County Dublin, 6 vols. Dublin. Gill and Macmillan. DU013-018---- Barrow - ring-barrow KELLYSTOWN 704987, 738056 Situated beside the railway line at Greenmount in the paddock are three conjoined circular features, comprising external bank (av. dims. Wth 2.5m; H 0.6m), internal fosse (av. dims. Wth 2m; D 0.25m) and raised interiors (av. ext. diams.11m). Test excavation (Licence no. 06E0348) was undertaken to determine the exact nature of three conjoined ring barrows possible barrows. Testing on the east-west axis located a ditch along the interior of the bank of one of the three conjoined circular embanked features. Its presence strongly suggests that the feature is a type of barrow and, by inference, that the other two circular features belong to the same monument typology (Lynch 2006). Compiled by Geraldine Stout; Updated by Christine Baker; Date of upload: 19 January 2015. DU013-019001- Church COOLMINE (Castleknock By.) 706440, 738918 There is a raised oval area (dims. L 50m E-W, Wth.30m) formerly within the grounds of Coolmine House. According to Healy there were human bones exposed on the site (1974, 21). Traditionally associated with St. Machtus and believed to be the site of the 'white chapel' which went out of existence about 1490 (Ronan 1940, 188). In the list of the churches of the dioceses c. AD 1275, the Crede Mihi, the church of 'Culmyn' is mentioned. It is also mentioned in the Taxation of 1292 and 1294. Now contained within the Millennium Park. The site was subject to geophysical survey (Licence no. 09R195) in advance of the proposed Metro West. Remains of enclosure ditches and possible pit type features associated with the Coolmine Church (DU013-019001-) and graveyard (DU013-019002-) were identified. A sub-circular enclosure (c.50m diam. NS) and further ditch remains extending to the south and east were associated with possible burnt/fired features which may indicate hearths or kilns (Nicholls 2009, 14). A dog run was instated directly abutting the eastern limit of the oval area without archaeological supervision. Compiled by Geraldine Stout; Updated by Christine Baker; Date of upload: 20 January 2015. References: o Nicholls, J. 2009a Geophysical Survey Report: Metro west, to Dardistown, Co Dublin (Licence no, 09R195). Unpublished report submitted to the National Monuments Service, Department of Arts, Heritage and the Gaeltacht. o Ronan, Rev. M.V. 1940 and Cloghran. Journal of the Royal Society of Antiquaries of Ireland 70, 182-93.

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SMR No Class Townland ITM Distance to site DU013-019002- Graveyard COOLMINE (Castleknock By.) 706435, 738909 A raised oval area (dims. L 50m E-W, Wth.30m) formerly in the grounds of Coolmine House, now Blanchardstown Millennium Park. According to Healy there were human bones exposed on the site (1974, 21). There are no grave markers. Associated with the 'white chapel' which went out of existence about 1490 (Ronan 1940, 188 (DU013-019001-). The site was subject to geophysical survey (Licence no. 09R195) in advance of the proposed Metro West. Remains of enclosure ditches and possible pit type features associated with the Coolmine Church (DU013-019001-) and graveyard (DU013-019002-) were identified. A sub-circular enclosure (c.50m diam. NS) and further ditch remains extending to the south and east were associated with possible burnt/fired features which may indicate hearths or kilns (Nicholls 2009, 14). Compiled by Geraldine Stout; Updated by Christine Baker; Date of upload: 20 January 2015. References: o 1. Nicholls, J. 2009a Geophysical Survey Report: Metro west, Tallaght to Dardistown, Co Dublin (Licence no, 09R195). Unpublished report submitted to the National Monuments Service, Department of Arts, Heritage and the Gaeltacht. o 2. Ronan, Rev. M.V. 1940 Mulhuddart and Cloghran. Journal of the Royal Society of Antiquaries of Ireland 70, 182-93. DU017-005---- Ringfort - unclassified PORTERSTOWN 706160, 736873 An aerial photograph (CUCAP, AVS 30) shows cropmark evidence for a roughly circular enclosure (diam. c. 40m). This site was partially excavated in 1990 prior to the development of Porterstown church car park (Cotter 1991, 27). The fosse visible on the aerial photograph was located. It was round-bottomed (Wth 2.5-3m; D 1.25m) and the fill was sterile except for some animal bone. Possible evidence for an opening in the east was detected. Overall, the archaeological remains indicate that the site is a levelled ringfort. A gully and some post-holes which produced a sherd of Bronze Age pottery indicate that there was earlier activity at the site. The site was subject to geophysical survey (Licence no. 06R180) which defined the extent of the ringfort, the eastern limit of which, extends under the playing pitches that adjoin the carpark (Krahn 2006). A sports club had been constructed further south, being accessed by a pathway that traverses the site. It is unknown if insertion of services had any effect. Compiled by Geraldine Stout; Updated by Christine Baker; Date of upload: 29 January 2015. References: o 1. Cotter, C. 1991a St. Olaf's Church, Balally. In I. Bennett (ed.), Excavations in 1990: summary accounts of archaeological excavations in Ireland, 24. Bray. Wordwell. o 2. Cotter, C. 1991b Porterstown. In I. Bennett (ed.), Excavations 1990: summary accounts of archaeological excavations in Ireland, 27. Bray. Wordwell. o 3. CUCAP - Cambridge University Collection of Aerial Photographs. Unit for Landscape Modelling, Department of Geography, University of Cambridge. o 4. Krahn, H. 2006 Archaeological Geophysical Surevy: St Mochtas Church, Porterstown, Clonsilla, Dublin 15 (Licence no. 06R180). Unpublished report submitted to the National Monuments Service, Department of Arts, Heritage and the Gaeltacht.

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APPENDIX 2: PREVIOUS ARCHAEOLOGICAL EXCAVATIONS

Excavation RMP OS Ref Location Ex. Bulletin Ref. Author No. St Marys Church, 02E1422 N/A 714902, 735473 2004:0488 J Kavanagh Clonsilla The excavation uncovered the remains of a coffin from the 1960s and disarticulated skeletal remains from the late 19th century. St Marys Church, 04E0033 N/A 704901, 738283 2004:0489 S. Keith Clonsilla A test excavation identified the presence of human remains on the site. The subsequent excavation uncovered the remains of 32 individuals on the site dating from the early 19th century onwards. 06E0348 DU013-018 704982, 738062 Kellystown, Clonsilla 2006:583 R. Lynch Pre-development testing was undertaken at Kellystown to determine the exact nature of DU013–018, which is listed as ‘ring-barrow possible’. The SMR file reported ‘three conjoined barrows, which comprise of an external bank and internal ditch enclosing slightly raised interiors. The features possess an average internal diameter of 11m; a bank width of 2.5m and a height 0.6m. The trenches located a ditch along the interior of the bank of one of the three conjoined circular embanked features. Its presence strongly suggests that the feature is a type of barrow and, by inference, that the other two circular features belong to the same monument typology. Trench 1 gave very little information. In Trench 2 the edges of the ditch could be identified. The ditch cut was 0.85m wide at the top, narrowing to 0.2m wide at the base, and was 0.7m deep. Finally, Trench 3 cut the southernmost circular feature. The circular bank of this feature was almost completely ploughed out. The ditch located in the interior of the low bank of Circular Feature B would strongly suggest that this circular feature is a barrow or, more accurately, an ‘embanked ring-ditch’. 09E0096 - 706042, 737534 Porterstown, Clonsilla 2009:299 M. Tierney

Test excavation for small link road. No archaeology found.

17E0256 DU013-018 705023, 738332 Clonsilla Road 2017:637 A O’Connell

Testing in advance of residential development. No archaeology found.

11 Archer Heritage Planning Ltd. The Old Schoolhouse, Clonsilla, Dublin 15 Archaeological Assessment

APPENDIX 3: RECORD OF PROTECTED STRUCTURES

RPS/NIAH Location Type Details Mid 19th century three-storey former school building. Former Detached gable-fronted three-bay two-storey over basement 700 Porterstown Clonsilla former school with attic accommodation, built 1854, with 11361001 Road, Schoolhouse gabled central projecting bay flanked by entrance porches. Now vacant. Architect:James Kennedy Esq. Mid 19th century Rail Keeper's Cottage at rail crossing. Detached three-bay single-storey former railway keeper's house, c.1850, with central gable-fronted projecting porch. Now derelict. ROOF: Hipped; slate; rendered chimney stack; 599 Porterstown Keepers terracotta pots; overhanging eaves; gable fronted double 11361005 Road, Cottage pitched slate porch roof with timber barge boards. WALLS: Lime washed. OPENINGS: Square headed windows; lugged rendered surrounds; painted stone sill, 2/2 timber sash window; segmental headed door ope; tongue and groove timber panelled half door. Late 18th century single-arched stone road bridge over Royal Canal. Single-arch limestone bridge over canal, c.1800, with Porterstown 698 Kennan plaque over arch. Plaque reads: "In memory of sixteen Road; Royal 11361004 Bridge people/who lost their lives/when the/Dublin to Canal Longford/passenger boat sank here/25 November 1845/Erected by R.C.A.G. 25 Nov 1995. RPS – Porterstown Water Pump Cast-iron water pump, c.1870, now missing parts. 11361002 Road, Mid 19th century Church of Ireland church within enclosed graveyard. Located on site of earlier church. Detached Church of Ireland church, built 1846, set in graveyard. Five- bay side elevation to nave, with single-bay three-stage castellated bell tower to west. Single-bay chancel to east with single-bay vestry attached to north elevations. Grave dating from c.1600 to the present with various cut stone grave markers. ROOF: Double pitched; slate; limestone coping to 705 St. Mary's Clonsilla Road gables; cast-iron rainwater goods. WALLS: Snecked and 11353005 Church (CofI) tooled limestone; plinth course; limestone buttresses to side elevation. OPENINGS: Lancet windows; limestone hood mouldings; canted limestone reveals and cills; original diamond pane casements; bi-partite window openings to tower, timber louver windows to bell tower; monumental Gothic arched door; stepped limestone jambs; hood moulding; original tongue and groove double doors. INTERIOR: Stained glass window by Evie Hone Clonsilla 706 Callaghan Late 18th century single-arched stone road bridge over Royal Road. Royal 11353003 Bridge Canal at Clonsilla Train Station Canal

12 Archer Heritage Planning Ltd. The Old Schoolhouse, Clonsilla, Dublin 15 Archaeological Assessment

RPS/NIAH Location Type Details Mid 19th century signal box and cast-iron pedestrian overbridge at Clonsilla Train Station. Station building demolished and replaced by modern structure. Detached single-bay two-storey signal box, c.1850, with timber superstructure on red brick ground floor plinth. Cast-iron Clonsilla pedestrian bridge, c.1850, spanning railway track. ROOF: 707 Clonsilla Road Signal Box & Double pitched slate roof with terracotta ridge tiles and 11353004 Overbridge projecting eaves. Timber barge boards and finials. WALLS: Red brick ground floor on a brick plinth and tongue & groove timber first floor. OPENINGS: Square headed openings with side sliding timber framed windows; segmental headed window with brick reveals concrete cills; four paned timber casement windows. Detached five-bay single-storey Tudor style former railway keeper's house with dormer attic, c.1900, on an irregular plan. Two single-storey extensions to rear. ROOF: Double pitched terracotta tiled roof with red brick corniced chimney NIAH Workers Clonsilla Road stacks and terracotta pots; skylights to front pitch; lead and 11353006 House felt flashed roof to rear. WALLS: Rough cast rendered with nap rendered quoins and timber Tudor style details to gables. OPENINGS: Square headed with patent reveals, stone cills and a variety of timber casements; timber panelled door. Detached three-bay single-storey house mid-19th century house with distinctive advanced gabled-fronted bays added in late 19th century. Detached three-bay single-storey house, c.1880, with gabled projecting end bays. Outbuildings to north-east. ROOF: Double pitched tiled roof; clay ridge tiles; hipped tiled rear roof with large, rendered chimney stack on ridge with a terracotta pot; two rendered stacks to front roof pitch with single moulded clay pot to rear; carved timber barge boards to gable fronted double pitched roofs; flat roof 945 Luttrellstown The Gables to single storey extension to rear; cast-iron rainwater goods. 11361007 Road (House) WALLS: Rough cast rendered walls on smooth rendered plinth with exposed timber frame to gables. OPENINGS: Segmental headed window openings, patent rendered soffits, reveals and granite sills surrounding tripartite timber casement windows; segmental headed door openings, patent rendered soffits and reveals with chamfered angle around timber doorcase comprising sidelight over fluted panels flanking partially glazed timber panelled door, three paned segmental overlight.

13 Archer Heritage Planning Ltd. The Old Schoolhouse, Clonsilla, Dublin 15 Archaeological Assessment

RPS/NIAH Location Type Details Detached four-bay two-storey former presbytery, c.1830, with two-storey return to rear. Single-storey extension and conservatory to rear, c.1980. Now in use as dwelling. Outbuilding to north. ROOF: Double pitched; tiled; terracotta ridge tiles; rendered stacks; clay pots; slight overhanging 727 Porterstown Home Villa eaves. WALLS: Rough cast render; rendered quoins and 11361008 Road (House) plinth course. OPENINGS: Square headed, rendered soffits and reveals; painted stone cills replacement 9/9 timber sashes, 3/3 to first floor windows; round headed front door, flat roofed porch with ionic columns c.1970, six panelled timber door; lead fanlight. Five-bay two-storey over basement 18th century house. Detached five-bay two-storey over basement house, c.1740, flanked by wings leading to pavilions, and having central gable-fronted projecting entrance bay. Return to rear. Outbuildings to north and east. Archbishop John Troy was born in Annfield House in 1739. He was Catholic Bishop of Ossary in 1776 and in 1786 was elevated to the Archbishopric of Dublin on the death of his cousin Dr. John Carpenter. Troy built the Pro-Cathedral in Dublin during early nineteenth century. ROOF: Double pitched tiled roof with clay ridge tiles; rendered chimney stacks flush with gables with Porterstown Annfield moulded clay pots; hipped slate roofs with clay ridge tiles to 728 Road (House) flanking pavilions and wings; rendered chimney stack to left wing; cast-iron rainwater goods; large curved angled chimney stack to rear. WALLS: Rough cast rendered walls with smooth rendered central porch with quoining; stepped cornice below gutters. OPENINGS: Square headed window openings, patent rendered soffits, reveals and painted stone cills surrounding single pane timber sash windows; round headed door opening; rendered soffits and reveals surrounding late 19th century timber panelled door; fanlight above timber lintel; door opening flanked by round headed sidelights with margin paned timber windows with stained glass.

14 Archer Heritage Planning Ltd. The Old Schoolhouse, Clonsilla, Dublin 15 Archaeological Assessment

RPS/NIAH Location Type Details Detached gable-fronted Gothic style Roman Catholic church, c.1890, with gabled projecting entrance porch. Six-bay side elevation with single-bay chancel to south, having sacristy attached to east. ROOF: Double pitched; tiled; moulded terracotta roof ridge tiles; limestone belfry slightly overhanging eaves; cast-iron rainwater goods. WALLS: Coursed rock faced ashlar granite; ashlar limestone plinth, cill and string course quoins; buttresses; belfry to front gable; gargoyles at corners; cast-iron cross capping belfry spire. OPENINGS: Pointed arched limestone dressed window Luttrelstown St. Mochta’s 729 openings with chamfered limestone cills; fixed pane clear and Road RC Church stained glass. Projecting gable fronted porch with pointed arched, carved hood moulding, limestone cross at apex, two leaf timber tongue and groove door with large ornate foliated cast-iron hinges. INTERIOR: Nave and chancel divided by pointed arch, open timber truss roof, timber gallery at west end contains organ accessed by cast-iron spiral stairs. Timber confessional and pews. Trefoil headed windows in depressed pointed arch surrounds. Stained glass windows dating to 1893, 1908, 1978 and 1993. Porch has polychromatic tiled floor.

15 N

Site Location

DU013-019(1-2)

DU013-017(1-3)

DU013-018

Site Location

500 m

Scale: 1:10,000 A4 Unit 8 Beat Centre The Old Schoolhouse, Clonsilla Stephenstown, Date: Dec 2020 , Origin: NMS & OSI Co. Dublin Impact Assessment Ref: 2021_04_AIA_01

Figure 1: Location of site and surrounding RMP's Scale: Not to scale Unit 8 Beat Centre The Old Schoolhouse, Clonsilla Stephenstown, Date: Dec 2020 Balbriggan, Origin: Client Co. Dublin Impact Assessment Ref: 2021_04_AIA_02

Figure 2: Proposed Site Layout N

Scale: Not to scale Unit 8 Beat Centre The Old Schoolhouse, Clonsilla Stephenstown, Date: Dec 2020 Balbriggan, Origin: OSI Co. Dublin Impact Assessment Ref: 2021_04_AIA_03

Figure 3: Extract from OSI 1st Edition 6" map N

Scale: Not to scale Unit 8 Beat Centre The Old Schoolhouse, Clonsilla Stephenstown, Date: Dec 2020 Balbriggan, Origin: OSI Co. Dublin Impact Assessment Ref: 2021_04_AIA_04

Figure 5: Extract from OSI 25" map N

Scale: Not to scale Unit 8 Beat Centre The Old Schoolhouse, Clonsilla Stephenstown, Date: Dec 2020 Balbriggan, Origin: OSI/Digital Globe Co. Dublin Impact Assessment Ref: 2021_04_AIA_05

Figure 5: Aerial View of site; Digital Globe 2011_2013 N

Scale: Not to scale Unit 8 Beat Centre The Old Schoolhouse, Clonsilla Stephenstown, Date: Dec 2020 Balbriggan, Origin: Google Earth Co. Dublin Impact Assessment Ref: 2021_04_AIA_06

Figure 6: Aerial View of site (ii); Google Earth Jan 2020 Archer Heritage Planning Ltd The Old Schoolhouse, Clonsilla, Dublin 15; Archaeological Impact Assessment

Plate 1: View of canal embankment at south of site from south Plate 2: Eastern (front) elevation of Porterstown NS

Plate 3: Western (rear) elevation of Porterstown NS Plate 4: Porterstown NS from north

Archer Heritage Planning Ltd The Old Schoolhouse, Clonsilla, Dublin 15; Archaeological Impact Assessment

Plate 5: View of school-yard from south Plate 6: Eastern portion of site from west

Plate 7: View of site from western side of Porterstown NS Plate 8: View from western end of subject site