Museum
Kurfürstliches Castle Boppard

In Rhineland-Palatinate, the Electoral Castle of Boppard, also known as the Old Castle or Balduin's Castle, is located. Directly on the Rhine in the old town of Boppard, it was once a part of the medieval city fortifications and now serves as a museum.
History+
The castle's origins date back to around 1265, when King Richard of Cornwall, during the Interregnum, presumably had a keep built in the then-free city of Boppard. After Boppard was pledged to the Trier Elector Balduin of Luxembourg in 1312, the castle was expanded into a coercive and customs castle to secure his rule and the revenues from the Rhine customs. After a siege in 1327, Balduin subjugated the city. In the 14th century, the complex was expanded, including a customs house and the raising of the residential tower. In the Boppard War at the end of the 15th century, the castle was stormed by citizens and the customs house burned down.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: http://de.wikipedia.org/wiki/Kurf%C3%BCrstliche_Burg_%28Boppard%29#mediaviewer/Datei:Alte_Burg_Boppard.jpg
This description draws on the facts documented in the linked Wikipedia article; Wikipedia content is licensed under CC BY-SA 4.0. Wording and editing: Mobile History.
Location: 50.2327, 7.5937