The Pertteli Church was built probably between years 1500 and 1520 and was dedicated to St. Bartholomeus. First record of the local Uskela parish is from the 14th century and there has been at least one wooden church in Pertteli before. The original stone church was enlarged in the 18th and 19th centuries.
Finnish National Board of Antiquities has named the ancient road ("Hiidentie") and the church area as national built heritage.
Visby Cathedral (also known as St. Mary’s Church) is the only survived medieval church in Visby. It was originally built for German merchants and inaugurated in 1225. Around the year 1350 the church was enlarged and converted into a basilica. The two-storey magazine was also added then above the nave as a warehouse for merchants.
Following the Reformation, the church was transformed into a parish church for the town of Visby. All other churches were abandoned. Shortly after the Reformation, in 1572, Gotland was made into its own Diocese, and the church designated its cathedral.
There is not much left of the original interior. The font is made of local red marble in the 13th century. The pulpit was made in Lübeck in 1684. There are 400 graves under the church floor.