A distinctive landmark in the Helsinki cityscape, with its tall, green dome surrounded by four smaller domes, the building is in the neoclassical style. It was designed by Carl Ludvig Engel as the climax of his Senate Square layout: it is surrounded by other, smaller buildings designed by him. The church's plan is a Greek cross, symmetrical in each of the four cardinal directions, with each arm's façade featuring a colonnade and pediment. Engel originally intended to place a further row of columns on the western end to mark the main entrance opposite the eastern altar, but this was never built.
History
After Helsinki was made into the capital of Finland in 1812, Alexander I decreed in 1814 that 15 percent of the salt import tax were to be collected into a fund for two churches, one Lutheran and one Orthodox. The cathedral was built on the site of the smaller 1724–1727, which had been dedicated to its patroness, Ulrika Eleonora, Queen of Sweden. Helsinki Old Church was built between 1824 and 1826 in nearby Kamppi to serve the parish while the Ulrika Eleonora Church was being demolished and until the consecration of the new cathedral. The bells of the old church were reused in the cathedral. Construction of the cathedral began in 1830, although it was only officially inaugurated in 1852. Engel died in 1840. The building was later altered by Engel's successor, whose four small domes emphasise the architectural connection to the cathedral's models, Saint Isaac's Cathedral and Kazan Cathedral in St. Petersburg. Lohrmann also designed two extra buildings to the sides of the steps: looking from the square the left building is a bell tower and the right building a chapel. He also erected larger-than-life sized zinc statues of the Twelve Apostles at the apexes and corners of the roofline in 1849. They were sculpted by August Wredov and Hermann Schievelbein and cast by S. P. Devaranne in Berlin in 1845–1847. The altarpiece was painted by Carl Timoleon von Neff and donated to the church by emperor Nicholas I. The cathedral crypt was renovated in the 1980s by architects Vilhelm Helander and Juha Leiviskä for use in exhibitions and church functions; Helander was also responsible for conservation repairs on the cathedral in the late 1990s. Today, the cathedral is one of Helsinki's most popular tourist attractions. In 2018 there were half a million visitors. The church is in regular use for services of worship and special events such as weddings.
