EVA London Conference ~ 11–13 July 2007 Eva Zányi, Carla Schroer, Mark Mudge, and Alan Chalmers _____________________________________________________________________ LIGHTING AND BYZANTINE GLASS TESSERAE Eva Zányi†, Carla Schroer‡, Mark Mudge‡, Alan Chalmers† † Warwick Digital Laboratory University of Warwick Coventry CV4 7AL United Kingdom
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[email protected] http://www.warwickdigital.org ‡ Cultural Heritage Imaging San Francisco USA
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[email protected] http://www.c-h-i.org Abstract – A key component of many Byzantine churches was the mosaics on the curved walls and ceilings, which included gold and silver glass tesserae. As the viewer or the light moved within the church, these tesserae sparkled. In this paper we describe how we captured a Polynomial Texture Map of the apse mosaic at the Angeloktisti Church at Kiti, Cyprus and used it to investigate how the position of the lighting may have affected the appearance of the mosaic. Our study showed that the appearance of the mosaics is indeed significantly different when lit from various directions. INTRODUCTION From the outside Byzantine churches look unimposing; without much decoration, no paint or precious materials. This is very different to the interior, which provided those inside the space with dramatic visual affects aiming at alleviating and engaging the viewer to approach God [14]. The architecture used light and shadow to symbolically represent different sacral hierarchies and direct the attention of the viewer. Therefore the upper parts of the churches, which represented heaven, were better lit than the lower parts. In early Byzantium this was achieved with the help of daylight through small xxxx Figure 1.