The church and monastery of the Augustinian hermits in Erfurt was built around 1300. Martin Luther, the famous Augustinian monk, was admitted to the monastery on 17 July 1505. The Augustinian Monastery pays tribute to Martin Luther with a new exhibition. The Lutherzelle (Luther's cell) can be visited as part of the exhibition. Since 1988 the monastery has been used as an ecumenical conference centre and a memorial to Luther.
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.