Sunnersberg medieval church dates back to the 1200s, but it has been enlarged and reconstructed several times. Fire damaged it badly in 1583. The most remarkable detail is an altarpiece, which is painted by famouse Flemish Baroque artist Anthony van Dyck in 1620. It was donated to Sunnesberg church by Clas Julius Ekeblad in 1779. The pulpit was donated by Magnus Gabriel De la Gardie in 1670.
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.