Helsinki Cathedral is an Evangelical Lutheran cathedral of the Diocese of Helsinki. The church was originally built as a tribute to the Grand Duke, Nicholas I, the Tsar of Russia and until the independence of Finland in 1917, it was called St. Nicholas' Church. A distinct landmark in the scenery of central Helsinki, with a tall green dome surrounded by four smaller domes, the church was built in 1830-1852, in neoclassical style. It was designed by Carl Ludvig Engel. Today the cathedral is one of the most popular tourist attractions in Helsinki. Annually more than 350,000 people visit the church, some of them to attend religious events, but most as tourists. The church is in regular use for both worship services and special events such as weddings