Tammisaari church is one the rare Finnish stone churches built in the 17th century. The building began in 1651 and was completed in 1670s. The church was destroyed by fire in 1821 and reconstructed to the present appearance in 1839-1842.
The white church tower is a landmark the Tammisaari old town (built mainly in the 19th century), which is a popular tourist attraction.
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.