This 14C church (extended in the 16C-17C) is decorated by a fine Gothic doorway. The rose window was designed by Guillaume de Marcillat (1467-1539), a French master glassworker, who originally came to Italy to work in the Vatican before settling in Arezzo. The doorway of the small cloisters and door of the baptistery are by San Giovanni, according to plans by Sansovino.