St. Catherine's Church is a medieval church, first mentioned in 1396. The present stone church was probably preceded by a wooden church dating from 1351. The oldest part of the church is the sacristy. In 1396 German pirates, the "Victual Brothers", looted and burned the old church. The construction of the new church building began at the beginning of the 15th century.
The Synagogue in Turku is an Ashkenazi synagogue built in 1912 by architects Eskil Hinderson and August Krook. This Neo-Romanesque brick building still serves as a synagogue.
Turku Cathedral was probably built in wood at the very end of the 13th century, but the present building dates from the 14th and 15th centuries. Since then, Turku Cathedral has also been renovated several times. The tower has been erected three times since the fires of 1681, 1738, and 1827. Due to the long period of construction, the cathedral displays several different styles, including Romanesque, Gothic and Neo-Gothic. Its age and the uniqueness of its architecture make the cathedral an important historical building in the country, which is often called the "National Sanctuary of Finland".