Ravenna was the centre of the Roman Empire in the 5th century. It holds the richest collection of late Roman and early Byzantine mosaics dating from the 5th and 6th centuries, an artistic heritage ...

Italy's Ravenna: Once powerful, still glorious By Rick Steves June 17, 2011 In Ravenna's Basilica di San Vitale, viewers with binoculars can pick out details, such as the Three Magi, in the mosaics.