Gothic churches in the 13th century were 159 meters high, once the tallest building in the world (1549-1625). They were destroyed by fire. Now they are seen as rebuilt churches, 124 meters high. They are the tallest building in the old city of Tallinn and the landmark of Tallinn. Saint Olaf Church in Tallinn is a church in Tallinn, Estonia. It was founded in the 12th century and was the center of the old Tallins Scandinavian community before Denmark conquered Tallinn in 1219. Its chief protector was Olaf II, the earliest written record of which was found in 1267, and a large-scale reconstruction was carried out in the 14th century.