Uspenski CathedralThere is no way you can miss visiting the largest orthodox church in Western Europe. It was built in late 19th century. Located near the market square, the church has 5 onion shaped domes. The domes are topped with 22 carat gold. It is a Russian church.
Our stay in Helsinki was short (one night, so we did not get to see many of the tourist sights. This is the Uspenski Cathedral built in 1862; unfortunately, it was closed when we went to see it. It is the largest Orthodox Church in Western Europe.