The Cathedral Museum and Crypt of St Rufino, founded in 1941, offers a secular, spiritual and cultural reading of the diocese. The museum contains archaeological remains, capitols, religious vestmentsand extremely interesting paintings. The visit ends with the 11th century crypt of St Rufino, locaded directly beneath the cathedral façade, where there are some 12th century frescoes and a 3rd century BC Roman sarcophagus that was used to buty the body of the saint.