Helsinki Cathedral (Finnish: Helsingin tuomiokirkko, Suurkirkko; Swedish: Helsingfors domkyrka, Storkyrkan) is the Finnish Evangelical Lutheran cathedral of the Diocese of Helsinki, located in the neighbourhood of Kruununhaka in the centre of Helsinki, Finland. The church was originally built from 1830-1852 as a tribute to the Grand Duke of Finland, Tsar Nicholas I of Russia.