The church, with its twin bell towers and copper dome, was designed by St. Petersburg court architect Luigi Rusca and built in 1820-27. The main iconostasis is from the 19th century and the older ones in aisles from the turn of 17th and 18th centuries. Today the church is used by the Russian Orthodox Parish of Tallinn.
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.