[3] The Antipope Clement III (Archbishop Wibert of Ravenna) died in Civita Castellana on 8 September 1100.

[6] The diocese of Gallese was restored on 20 December 1805, by Pope Pius VII, in the bull "Romanorum Pontificum", and the old cathedral, which had been reduced to the status of the collegiate church of S. Maria Assunta, again became a cathedral, served by twelve Canons, and headed by two dignities, the Archpriest and the Archdeacon.

[10] In accordance with Pope Eugenius' decree, the bishop was required to hold his Chrism Mass (usually on Holy Thursday) and his ordinations of priests in alternate years in Orte and in Civita Castellana.

[11] In the mid-19th century, the cathedral of Civita Castellana was administered and serviced by a Chapter consisting of one dignity, the Archpriest, and eighteen Canons.

The convent had been emptied by the French occupation forces under Napoleon, and when they were driven out, permission to convert it to diocesan use was given by Pope Pius VII, and it opened in 1825.