Curiously resembling the Parthenon in Greece, the Eglise de la Madeleine (named after Mary Magdalene) was originally slated to be a government hall, a library, and a National Bank. It was originally built in the 18th century to the site of ancient Jewish synagogue. The Madeleine Church was designed in its present form as a temple to the glory of Napoleon's army in 1806.
The latter eventually got his way, and in 1842 the odd place of worship was consecrated. The facade comprises 52 Corinthian columns supported by a decorative fresco. Inside, a remarkable statue of Joan of Arc is one highlight, as are paintings depicting the marriage of the Virgin and the baptism of the Christ child.
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.