Paul Denis, Associate Curator, World Cultures, Royal Ontario Museum, describes how Ancient Romans used Mosaics to decorate their walls in their public building and private residences. The mosaic in the video is 2000 years old and yet mosaics are used even today, an example being the ceiling of one of the Royal Ontario Museum entrances. To learn more about the ancient empires of Rome, Nubia and Byzantium, visit the Royal Ontario Museum in Toronto.