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. The work evokes the mosaics of the Byzantine and Norman churches found in Cefalù and Monreale in Sicily. The mosaic, in large part made by Francesco da Pisa, was brought to completion by Vincino da Pistoia with the Madonna on the left side (1320).