Church of Our Lady Assumed into Heaven in Ostrzeszów is a late-gothic parish church, founded by King Casimir the Great in mid-14th century. It was initially composed of presbytery and a sacristry. The nave was added in 1360. After the destruction by a fire of the late 15th century and by the Swedish invasion in mid-17th century, the church was rebuilt in 1721–1723. Gothic-style stained-glass windows were fixed in 1939.
The church’s altars are baroque in style – the main one containing a copy of The Assumption of Our Lady by the famous Spanish painter Murillo. The chancel arch features limewood sculptures, probably made by Albrecht Dürer.
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.