
If you've never heard of Ravenna, it's worth looking into. It is a city on the east coast of Italy. Among other treasures, this city is home to beautiful mosaics, heavily influenced by the Byzantine Empire, in churches such as San Vitale and San Apollonare Nuovo, and the Mausoleum of Galla Placida.
San Vitale holds the famous Justinian and Theodora mosaics. Justinian was the Emperor of the Byzantine Empire, and Theodora was his wife.
Mosaic basics: Mosaics are made up of tiny glass tiles called tesserae.