On the north side of Saint Agnes church in Goutum remnants of the an older tufa church from the 11th century or 12th century can be seen. The church was enlarged and heightened with brick in the 15th century and has a tower from the same century. The church was originally a Roman Catholic church dedicated to Saint Agnes, becoming a Protestant church after the Protestant Reformation.
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.