About Petersberg Citadel
Fortifications, Historic, Interesting Places, Castles
Petersberg Citadel (German:Zitadelle Petersberg) in Erfurt, central Germany, is one of the largest and best preserved town fortresses in Europe. The citadel was built on Petersberg hill, in the north-western part of the old town centre from 1665, when Erfurt was governed by the Electorate of Mainz. It is surrounded by over two kilometres of stone walls and is 36 hectares in size.
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Wikipedia
Erfurt, Thüringen, Deutschland, 99084