The apse, from 1504, houses a Funerary Chapel of Ludovico II, work by Antoine Le Moiturier (1425–74) covered with green stone and characterized by an elegant play of arches and sculptures. The sepulchre of Ludovico II is a Renaissance work by Benedetto Briosco. Annexed are the Gothic cloister and the Capitular Hall with the Mausoleum of a vicar-general of the marquisate, Galeazzo Cavassa di Carmagnola, a Renaissance work by Matteo Sanmicheli.