Located at the confluence of the Rhine and Moselle Rivers, the Fortress of Ehrenbreitstein is a UNESCO World Heritage Site that sits on a bluff overlooking the city of Koblenz.
The hill on which the fortress is located has been occupied since the fourth millennium B.C.E. Fortifications first appeared on Ehrenbreitstein sometime in the ninth or 10th century B.C.E. Various dynasties have built fortifications or castles on the site, including the Romans and the Carolingians.
The current fortress was built by the Prussians in the early 19th century as part of a regional fortification system to protect the Rhine Valley.