Now I have cards showing both cathedrals in Helsinki :) Not so long time ago I received one showing the Orthodox Cathedral and this one shows the Lutheran Cathedral. By the way, both Lutheran and Orthodox churches have national status in Finland, although only about 1% of Finns are Orthodox.
Helsinki Cathedral (in Finnish Helsingin tuomiokirkko or Suurkirkko, in Swedish Helsingfors domkyrka or Storkyrkan) is an Evangelical Lutheran cathedral of the Diocese of Helsinki, located in the centre of Helsinki, Finland. The church was originally built as a tribute to the Grand Duke, Nicholas I, the Tsar of Russia and until the independence of Finland in 1917, it was called St. Nicholas' Church. A distinct landmark in the scenery of central Helsinki, with a tall green dome surrounded by four smaller domes, the church was built in 1830-1852, in neoclassical style. Today the cathedral is one of the most popular tourist attractions in Helsinki. Annually more than 350,000 people visit the church, some of them to attend religious events, but most are tourists. The church is in regular use for both worship services and special events such as weddings.