The Church of Santa Caterina d'Alessandria, known as Sant'Agostino (14th-18th centuries), "state-owned" in 1810, was deconsecrated in 1932 and converted into a conference hall, later into a parish movie theater; the bell tower has Gothic elements. Consolidation and functional recovery work began in 2001, with use as the permanent home of the Bishop's Museum of Sacred Art. Dismantling the floor, numerous tombs from different eras were found, excavated on different levels of the ground; in the second chapel of the right aisle, the largely lost fresco known as the "Madonna del Soccorso" was rediscovered, attributable to Pagani of Monterubbiano (16th cent.). The convent, "demanized" as well in 1810, in 1874 became the bishop's residence and the seat of the offices of the curia and the archives of the diocese; since 1992 it has only been the seat of the archives, ordered and rich in documents since 1572.