Seest Church consists of a Romanesque choir and the ship, originally the apse, and a late medieval tower in the west. A late medieval porch in front southern door was demolished by the mid-1800s. The walls of chancel and nave is of field stone, and space has retained his flat beam ceilings. Arc is a brick wall on the Renaissance, possibly from 1539. During restoration 1963-64, led by architect JK Jepsen, Kolding, was after replacing the church's heating system by yellow square tiles in the floor and wooden floor under the new pews.
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.