Wikipedia
Plattenburg
Plattenburg is a municipality in the Prignitz district, in Brandenburg, Germany. It is named after the water castle of Plattenburg which is located in the district.
Plattenburg (castle)
The Plattenburg is a water castle in the independent municipality of Plattenburg in the German district of Prignitz in northwestern Brandenburg. It was first documented in 1319, making it the oldest surviving water castle in northern Germany.