Helsinki Cathedral is an Evangelical Lutheran church and for many, it is a symbol of Helsinki as a whole. It is part of the Empire-style centre of Helsinki designed by architect Carl Ludvig Engel. The Cathedral was consecrated in 1852 and named the Church of St Nicholas. When Finland became completely independent in 1917 it became known as the Great Church. When the Diocese of Helsinki was established in 1959, the name was changed into Helsinki Cathedral.

Helsinki Cathedral is the principal church of both the Helsinki Diocese and the Helsinki Cathedral Parish. The Cathedral serves the residents of central Helsinki and those who work in the city, as well as visitors. It is in active use for worship and concerts every day of the week. The Cathedral is also one of the most popular tourist sights in Helsinki and visited by about 500,000 people annually.