The church of Salem was built originally to the Romanescue style in the 1100s. There are some remains of fighting in the walls which refers the church has also had a defensive purpose. The porch was added in the 15th century and the church was mainly reconstructed in the 1600s.
The interior was restored in the 19th century. The font date from the 12th century and crucifix was made about one hundred years later.
References: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.