It stands at the foot of the Parco Oraziano, a park leading up into the surrounding mountains.
It was rebuilt in the second half of the 11th century by Bishop Pietro of Ravenna, commemorated by a bas-relief known locally, from its unusual appearance, as "Marzo Settecappotti" ("March Seven-Coats").
This building too had a dramatic existence: it was looted of all moveable goods by the troops of Emperor Frederick II, damaged by earthquakes in 1349 and 1456, set on fire by order of Louis XI of France and forced to accommodate the troops of Charles VIII in 1495.
The cathedral's present aspect is due to restoration works carried out in the 1960s and 1970s which removed the Baroque additions, returning it to a Gothic medieval appearance.
The marble bust (1795) of the cleric, (Primicerio) Antonio Rosario De bellis, was completed by Michele Coppa.