Ravenna mosaics; : the so-called Mausoleum of Galla Placidia, the Baptistery of the Cathedral, the Archiepiscopal Chapel, the Baptistery of the Arians, the Basilica San Apollinare nuovo, the Church of San Vitale, the Basilica of San Appolinare in Classe. - Bovini, Giuseppe (New York Graphic Society, 1956)