High on a hill in the Katajanokka neighborhood is the stunning Uspenski Cathedral. The Byzantine-Russian church was built in 1868 using bricks from the Bomarsund Fortress after it was destroyed during the Crimean War. The church’s best architectural feature is a dozen gilded onion domes representing the Apostles. They surround the larger central dome symbolizing Christ. Uspenskin Katedraali was dedicated to the Virgin Mary. Uspenski Cathedral is Western Europe’s largest Orthodox church. It is also the seat of the Archdiocese of Helsinki.