List of Scheduled Ancient Monuments of National Importance (as of 14.05.2020) Ref. Monument Community Broad Class Period Cadw Ref Number AM1 Cairnfield, Mynydd Eglwysilan, Senghenydd Aber Valley/ Nelson R, R & F* Prehistoric 5/3211/Gm352 AM2 Rectangular earthworks 530m SSW of Heol-Ddu-Uchaf Bargoed Defence Roman 5/0608/Gm164 AM3 Cairn 270m North of Pant Ffosyrhebog Darran Valley R, R & F* Prehistoric 5/2989/Gm313 AM4 Capel Gwladys, Fforest Gwladys, Gelligaer Gelligaer R, R & F* Early Medieval 5/2988/Gm309 AM5 Dyke 387m East of Clawdd Trawscae Farm Darran Valley Defence Early Medieval 5/2334/Gm261 AM6 Platform Houses on east side of Gelligaer Common Darran Valley Domestic Medieval 5/2992/Gm311 AM7 Site of Tegernacus Stone Darran Valley R, R & F* Early Medieval 5/3418/Gm339 AM8 Three Platform Houses on Cefn-y-Brithdir Darran Valley Domestic Medieval 5/2991/Gm317 AM9 Capel-y-Brithdir (monument) Darran Valley R, R & F* Medieval 5/6480/Gm451 AM10 Fforest Gwladys Roman Earthwork Practice Camp Gelligaer Defence Roman 5/2438/Gm273 AM11 Gelligaer Roman Site Gelligaer Defence Roman 5/1153/Gm016 AM12 Maen Cattwg (cup-marked stone) Gelligaer R, R & F* Prehistoric 5/1151/Gm176 AM13 Twyn Castell Gelligaer Defence Medieval 5/1152/Gm121 AM14 Cairn Cemetery on Mynydd Bach, Bedwas Maesycwmmer R, R & F* Prehistoric 5/3298/Mm196 AM15 Pen-y-Rhiw Round Cairn Maesycwmmer R, R & F* Prehistoric 5/0324/Mm149 AM16 VACANT AM17 Rhymney Upper Furnace, Llechryd Rhymney Industrial Post Medieval/ 5/3422/Gm403 Modern AM18 VACANT AM19 Garnedd Lwyd (remains of cairn) Senghenydd Round Aber Valley R, R & F* Bronze Age 5/0525/Gm462 Barrow AM20 Two Round Cairns on the Bryn Aber Valley Round Cairn Prehistoric Gm463 AM21 Cross Ridge Dyke and Cairn on Twyn Hywel Aber Valley Defence unknown 5/6512/Gm456 AM22 Bedwas Churchyard Cross, St Barrwg’s Church, Rectory Bedwas, Trethomas & R, R & F* Post Medieval 5/0622/Mm143 Road, Bedwas Machen AM 23 Begwns Round Barrow, Mynydd Machen Bedwas, Trethomas & R, R & F* Prehistoric 5/0626/Mm071 Machen AM24 Cornish Type Engine House, Bryngwyn Colliery Bedwas, Trethomas & Industrial Post Medieval/ 5/3698/Gm440 Machen Modern AM25 Caerphilly Castle Caerphilly Defence Medieval 5/1044/Gm002 AM26 Castle Morgraig Caerphilly Defence Medieval 5/0548/Gm/031 AM27 Caerphilly Mountain Shaft Mounds Caerphilly Industrial Post Medieval/ 16488/Gm454 Modern AM28 Bryn Owen Farm Cairns, Llanfabon Llanfabon R, R & F* Prehistoric 5/0868/Gm051 AM29 Carneddi Llwydion, Mynydd Eglwysilan Nelson R, R & F* Bronze Age 5/2835/Gm302 AM30 Site of former Rudry Ironworks Rudry Industrial Post Medieval 5/3195/Gm357 AM31 Ruperra Castle Rudry Domestic Post Medieval / 5/3322/Gm379 Modern AM32 Gwern-y-Domen Castle Mound Van Defence Medieval 5/2182/Gm218 AM33 Twmbarlwm Mound and Bailey Castle Risca Defence Medieval 3/2144/Mm044 AM34 Twyn-Yr-Oerfel Round Barrows, Ynysddu Mynydd-y-Grug Ynysddu R, R & F* Prehistoric 3/0366/Mm070 AM35 Twyn-Cae-Hugh, Round Barrow, Ynysddu Mynydd-y-Grug Ynysddu R, R & F* Prehistoric 3/0367/Mm3 AM36 Fort South of Penllwyn Fawr Pontllanfraith Defence Roman 3/1678/Mm96 AM37 Twyn Tudor Motte & Bailey Castle, Mynyddislwyn Mynyddislwyn Defence Medieval 3/2154/Mm035 AM38 Round Cairn 315m South of Upper Wenallt Risca R, R & F* Prehistoric 3/2335/Mm46 AM39 Charcoal Blast Furnace at Abercarn Abercarn Industrial Post Medieval / CAM1/1/6655/Mm Modern /250 AM40 Caerphilly Iron Furnace, Caerphilly Caerphilly Industrial Post Medieval / CAM1/1/6737/Gm Modern 503 AM41 Former Dam of Cwmcarn Canal Reservoir Crosskeys Water Post Medieval / CAM1/1/6746/Mm Supply & Modern /259(CAE) Drainage AM42 Machen Forge & Tinplate Works, Bedwas Bedwas, Trethomas & Water Post Medieval / CAM1/1/6905/Gm Machen Supply & Modern 516 Drainage AM43 Ruperra Hillfort & Motte, Rudry (Craig Ruperra) Rudry Defence Prehistoric GM511 (CAE) AM44 Pen-y-Fan Canal Reservoir, Crumlin Crumlin Water Post CAM 1/1/6911 Supply & Medieval/Modern Mm269(CAE) Drainage AM45 St. Sannan’s Churchyard Cross Bedwellty R, R & F* Medieval A-CAM 1/1/7327/Mm310 AM46 Mynydd Machen House Platforms to W Bedwas, Trethomas & Agriculture & Medieval & Post Mm337 (CAE) Machen Subsistence Medieval Secular AM47 Ruperra Castle Lower Summerhouse remains Rudry Domestic Post Gm590 (CAE) Medieval/Modern AM48 Gelligaer Common Round Cairns Bedlinog, Merthyr Tydfil R, R & F* Prehistoric Gm220 AM49 Cefn Man Moel Cross-Ridge Dyke Cwm / Argoed Defence unknown MM345(BLG) AM50 Mynydd Machen, House Platforms to NW Bedwas, Trethomas & Agriculture & Medieval Machen Subsistence AM51 Rhaslas Pond South Dam Darran Valley Water supply Post Medieval Gm624 & drainage AM 52 Prehistoric Rock Art Mynydd Eglwysilan Common. Nelson R, R & F* Early – Middle Gm628 Confirmed by Cadw 06.01.2020 Sites A & B Bronze Age Abbreviations *R, R & F = Religious, Ritual and Funerary .