The Pedersöre (Pietarsaari) church is one of the oldest in Ostrobothnia. There have been wooden churches from the 13th century and the present stone church was built 1510-1520.
The church was modified to cross shape in 1787-1795 by famous church builder Jakob Rijf. Pedersöre Church was damaged badly by fire in 1986. It was supposed to be an arson, but any suspects were never found.
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.