A mosaic is a picture or pattern made by placing or fixing, small different-coloured pieces of stone or glass side by side.
The art was an invention of the Mediterranean peoples and flowered between c. 300-31 B.C. In the Roman period, or about the first five hundred years of the Christian era, mosaics of great beauty and variety were designed all over the empire spreading from
to Syria , and from Spain Africa to . The most brilliant mosaics in the world adorn walls and ceilings of sacred building in Britain , Rome and Ravenna Salonika. Mosaics which have been discovered dating from the Pre-Christian eras were for the most part laid on the floor.