Ravenna is one of those places that you remember for life. This is due to Byzantine mosaics, decorating churches, chapels and baptisteries, inscribed on the Unesco World Heritage List. The most beautiful ones are in the basilica San Vitale, but I was equally impressed by the mosaics decorating the mausoleum of Gaul Placidia, the Arian baptistery and the Basilica of St. Apollinaris in Classe.