Helsinki Cathedral is the Finnish Evangelical Lutheran cathedral of the Diocese of Helsinki, located in the neighbourhood of Kruununhaka in the centre of Helsinki, Finland. Work on the construction of St. Nicholas Cathedral in Helsingfors began in 1830, and led them by German architect Carl Ludvig Engel. Cathedral have decided to dedicate the patron of sailors and ruled at that hour of the Emperor Nicholas I – St. Nicholas the Wonderworker. Engel did not finish one of his most ambitious works – he died in 1840. But his work was continued by another German – Ernst Lohrmann, under whose leadership the church was completed and inaugurated on 15 February 1852.