Abbey of San Cassiano, Narni

The Abbey of San Cassiano is a former Benedictine monastery, located on Monte Santa Croce, outside of the town of Narni in the Province of Terni, in the Region of Umbria in Italy.

Documentary evidence dates the monastery in 1091 falling under the governance of the Abbey of Farfa in Lazio.

One sarcophagus notes the 10th-century discovery during the reign of Crescentius I (a near relative of Pope John XIII) of relics of the Blessed Orso, a local monk.

It is possible that an abbey at the site dates to the occupation of Italy by the Byzantine general Belisarius in the 6th century.

The Romanesque architecture stone church with belltower was stripped of Baroque accretions during the latest restoration.