St. Olaf's 124m spire is a Tallinn landmark, and was the tallest building in Europe between 1549 and 1625. An old legend claims that the church was built to attract more merchant ships to the town by a mysterious craftsman who promised to work for free if the townspeople discovered his name (Olev). In reality, the church took its name from the canonised Norwegian king, Olav Havaldsson. The first mention of the church dates to 1267, but the interior dates to 1840 and reflects that era's Historicist bent. NB! Due to renovation works the church is open only during services.