Acerno Cathedral is a Roman Catholic cathedral, dedicated to Saint Donatus of Arezzo. From the 11th century it was the seat of the Bishop of Acerno. The bishopric was united to the Archbishopric of Salerno in 1818 to form the Archdiocese of Salerno-Acerno, renamed in 1986 the Archdiocese of Salerno-Campagna-Acerno, in which Acerno Cathedral is a co-cathedral.
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.
The interior, on a Latin cross floorplan, consists of a central nave and two side-aisles, a transept, an apse and a sacristy, as well as the usual service areas. Because of the recent destruction no reliefs or decorative works are now to be seen, except for some 18th-century frescoes attributed to Leonardo Pallante and the high altar.
As for the building's exterior, the very plain west front has a principal central doorway between two smaller ones, above which are two windows to either side of a small central rose window beneath a simple Classical pediment containing an oculus. The bell tower has four storeys and terminates in an onion dome with a metal shell.
References:Visby Cathedral (also known as St. Mary’s Church) is the only survived medieval church in Visby. It was originally built for German merchants and inaugurated in 1225. Around the year 1350 the church was enlarged and converted into a basilica. The two-storey magazine was also added then above the nave as a warehouse for merchants.
Following the Reformation, the church was transformed into a parish church for the town of Visby. All other churches were abandoned. Shortly after the Reformation, in 1572, Gotland was made into its own Diocese, and the church designated its cathedral.
There is not much left of the original interior. The font is made of local red marble in the 13th century. The pulpit was made in Lübeck in 1684. There are 400 graves under the church floor.