Construction of the present building began in 1575 on the ruins of an earlier church which was declared the cathedral of the
diocese of Acerno in 444 by
Pope Leo I. As a consequence of many earthquakes, in particular that of 1980 and the fire that followed it, the structure has undergone numerous changes. As a result of a reconstruction project in 1989 the building has been completely restored and reopened for worship. == Internal structure ==