The city of mosaics is now on the UNESCO list as a worl heritage patrimony.
Ravenna was the seat of the Roman Empire in the 5th century and then of Byzantine Italy until the 8th century. It has a unique collection of early Christian mosaics and monuments. All eight buildings – the Mausoleum of Galla Placidia, the Neonian Baptistery, the Basilica of Sant'Apollinare Nuovo, the Arian Baptistery, the Archiepiscopal Chapel, the Mausoleum of Theodoric, the Church of San Vitale and the Basilica of Sant'Apollinare in Classe – were constructed in the 5th and 6th centuries. They show great artistic skill, including a wonderful blend of Graeco-Roman tradition, Christian iconography and oriental and Western styles.
Later, the change of the Po river and the venitian dominion as well as the papacy prevented Ravenna from growing and changing its constructions: the result is an amazing witness of its past glory at the highest level.