*An art form in which pictures and designs are built up from thousands of small tiles made of colored glass or ceramics. It was an important art form in classical Rome, in the Byzantine empire, and, in the form of geometric designs, through the Islamic world. | *An art form in which pictures and designs are built up from thousands of small tiles made of colored glass or ceramics. It was an important art form in classical Rome, in the Byzantine empire, and, in the form of geometric designs, through the Islamic world. |