Nun. Interior, San Pietro extra Moenia, founded in 419 to house the supposed chains that once bound St Peter. It was built over an ancient necropolis. Reconstruction occurred from the 12th century to the 15th century, when a remarkable Romanesque façade was added: this has three doors with rose-windows, with a splendid relief decoration by local artists, portraying stories of the life of St. Peter. Umbrian Romanesque.
Rebuilt in the 17th century in the Baroque style.