The Unterlinden Museum is located in Colmar, in the Alsace region of France. The museum, housed in a 13th-century Dominican religious sisters' convent and a 1906 former public baths building, is home to the Isenheim Altarpiece by the German Renaissance painter Matthias Grünewald and features a large collection of local and international artworks and manufactured artifacts from prehistorical to contemporary times. It is a Musée de France. With roughly 200,000 visitors per year, the museum is the most visited in Alsace.
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.