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roman mosaic
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A Roman mosaic is a mosaic made during the Roman period, throughout the Roman Empire. Mosaics were used in a variety of private and public buildings, often incorporating.
==Technology==
Roman mosaics are constructed from geometrical blocks called tesserae,〔Katherine M. D. Dunbabin, ''Mosaics of the Greek and Roman world'', Cambridge University Press, 2006, p. 280〕 placed together to create the shapes of figures, motifs and patterns.〔Witts, P. 2010. Mosaics in roman Britain: Stories in Stone. Stroud: History Press.〕 Materials for tesserae were obtained from local sources of natural stone, with the additions of cut brick, tile and pottery creating coloured shades of, predominantly, blue, black, red, white and yellow.〔 Polychrome patterns were most common, but monochrome examples are known. Marble and glass were occasionally used as tesserae,〔Ricciardi, P. ''et al.'' 2009. "A non-invasive study of Roman Age mosaic glass tesserae by means of Raman spectroscopy", ''Journal of Archaeological Science'' 36, pp. 2551-2559.〕 as were small pebbles and precious metals like gold.〔Neri, E. and Verita, M. 2013. "Glass and metal analyses of gold leaf tesserae from 1st to 9th century mosaics. A contribution to technological and chronological knowledge", ''Journal of Archaeological Science'' 40. pp. 4596-4606〕 Mosaic decoration was not just confined to floors but featured on walls and vaults as well. Traces of guidelines have been found beneath some mosaics, either scored into or painted onto the mortar bedding. The design might also be pegged out in string,〔 or mounted in a wooden frame.
The collapse of buildings in antiquity can, paradoxically, both irrevocably destroy mosaics or protect and preserve them.〔
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