Transfiguration Church of the St. Euphrosine monastery is a well-preserved monument of Pre-Mongol Rus architecture. It was built between 1152 and 1161 by the Polatsk architect Ioann by the order of the princess St. Euphrosyne of Polatsk as a cathedral church of the Convent of the Saviour and St. Euphrosyne. In 1582, King Stefan Batory gave the church to the Order of Jesuits. In 1832, the church was placed under the Orthodox administration, and in 1990 it became a property of the Belarusian Exarchate. In the 19th century it was partially remodeled according to the design by the architect A. Port.
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.