The Altenburg is a castle that sits on the tallest of the seven hills of Bamberg, southern Germany, overlooking the town. It is located in Upper Franconia, a region in the state of Bavaria, and dates back to at least 1109.
Wikipedia https://en.wikipedia.org/wiki/Altenburg_(Bamberg)
Official website http://en.bamberg.info/poi/altenburg_castle-4647/
Address 1 Altenburg, 96049, Germany
Coordinates 49°52'51.098" N 10°52'10.233" E