Uspenski Cathedral or Cathedral of the Dormition of the Theotokos (Swedish: Uspenskijkatedralen) is the main church or cathedral of the Orthodox Church of Helsinki and at thesame time of the Diocese of Helsinki and the Orthodox Archdiocese of Finland. The red brick church is located in the center of Helsinki on the Katajanokka rock.Uspenski Cathedral is the largest Orthodox church in Northern and Western Europe. It is also a popular tourist destination with up to half a million visitors each year The name of the church comes from the Slavic word uspenie, which means falling asleep (death). Indeed, the cathedral is dedicated to the memory of the God-Birther's deathly sleep, whose memorial day is celebrated on August 15.