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:Bomarsund fortress and garrison was built in 1832-1854 by Russian Empire to defence Åland Islands against enemies. British and French fleet attacked against it during the Crimean War in 1854. After a week of fighting the British stormed the remaining fort. Anglo-French forces destroyed it totally after battle. In the Treaty of Paris 1856, the entire Åland Islands were demilitarized, which is a status that has been preserved until this day.
Nowadays there are some ruins left and fortress area is open for visitors.