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.