 The granite Corinthian columns between the nave and the apse come from the mosque of Palermo, and are Pisan spoils retained in 1063 after a successful joint attack with the Normans on the Muslims in that city.The large mosaic in the apse of "Christ enthroned between the Virgin and Saint John" is famous for the face of Saint John, painted by Cimabue in 1302, which miraculously survived the fire of 1595.This is the last work painted by Cimabue and the only work of his for which we have certified documentation.