A mosaic is a colorful form of art incorporating small pieces of glass, tile, stone, ceramic, and other materials into a larger image. Individual tiles are called tessera. One method of mosaic construction involves gluing tesserae to a support structure. Mosaics dating to the third century BC have been found in Mesopotamian temples. Ancient Romans decorated their homes with mosaic floors. Mosaic images have adorned churches, synagogues, and temples for millenia.