Schloss Darfeld was built in 1612-1616 by the Münster architect and sculptor Gerhard Gröninger, who brought Venetian Renaissance style to the northern Germany. The Droste family to Vischering bought the property in 1680. The house was largely destroyed in 1899 by a big fire. The reconstruction in today's form according to plans by Hermann Schaedtler lasted until 1904.
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.