The Diocesan Museum of Sacred Art (MuDAS)[1] (Italian: Museo diocesano di arte sacra) in Arezzo was founded in 1963 but opened regularly to the public only in 1985, and was housed in several rooms above the sacristy of the Cathedral of San Donato.

Highlights of the museum include several works of Giorgio Vasari and the Pace di Siena.

The museum is accessible to the disabled, offers space for teaching, temporary exhibitions, and restoration.

[3] The museum occupies five rooms and offers an itinerary focusing on history, art, and devotional practices of the region, the Diocese of Arezzo-Cortona-Sansepolcro.

Of note are: The final two rooms present works of art and liturgical objects dating from the 17th to the 19th centuries, from the cathedral and churches of the diocese.