Helsinki Cathedral (Finnish: Helsingin tuomiokirkko, Suurkirkko; Swedish: Helsingfors domkyrka, Storkyrkan) 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 to 1852 as a tribute to the Grand Duke of Finland, Emperor Nicholas I of Russia. It was also known as St Nicholas's Church (Finnish: Nikolainkirkko, Swedish: Nikolajkyrkan) until Finland declared its full independence in 1917. It is a major landmark of the city, and one of the most famous historical structures in Finland as a whole when viewed globally.
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