Dassel Mansion - Credit: Wikimedia Commons
The Dassel Mansion (German: Haus Dassel) is a 19th century mansion in Allagen, now part of Warstein, Germany. It was commissioned by quarry owner and manufacturer Victor Röper as his main residence and the office building for his companies. After he declared bankruptcy it was taken over by Georg Dassel, an offspring of the noble von Dassel family. The building currently is operating as a landmarked museum. Read more on Wikipedia
Source: en.wikipedia.org