Helsinki Cathedral is an Evangelical Lutheran cathedral of the Diocese of Helsinki, located in the centre of Helsinki, Finland. Designed by Carl Ludvig Engel to form the focal point of Senate Square, it was built from 1830 to 1852 in the Neoclassical style. The church's plan forms a Greek cross (a square centre and four equilateral arms), symmetrical in each of the four cardinal directions. The cathedral is one of the most popular tourist attractions in Helsinki, with more than half a million visitors in 2018.