The Crypt of the Helsinki Catherdal

Helsinki Cathedral is the Finnish Evangelical Lutheran cathedral of the Diocese of Helsinki, located in the neighborhood of Kruununhaka in the centre of Helsinki, Finland at the Senate Square. The church was originally built from 1830–1852 as a tribute to the Grand Duke of Finland, Tsar Nicholas I of Russia. It was also known as St Nicholas's Church until the independence of Finland in 1917. It is a major landmark of the city, and possibly the most famous structure in Finland as a whole when viewed globally.

Source: Wikipedia