The most important architectural heritage in Csempeszkopács is the Árpád Age church. It was the church of the Kopács part of the village. It was dedicated to Saint Michael archangel. This 13th-century romanesque style church stands on a little hill. Inside details of the medieval murals can be seen. Later the church was renewed in the barock style. The main altar's painting was painted by Stephan Dorfmeister.
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.