Agen Cathedral's (Cathédrale Saint-Caprais d'Agen) visible structure dates back to the 12th century. It was built as a collegiate church of canons dedicated to Saint Caprasius, on the foundations of a basilica sacked by the Normans in 853 but thereafter restored.
Sacked again in December 1561 during the Wars of Religion, by two years after the countrywide coup d'état that took place in 1789, the cathedral had come to store fodder before being reopened in 1796 and being elevated to the status of the city's cathedral in 1801. This new cathedral replaced the old cathedral in the town, which was destroyed during the French Revolution, thereby becoming the bishop's seat in the diocese.
The cathedral appears in one of the earliest color photographs ever taken by Louis Arthur Ducos du Hauron in 1877.
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.