Hohensalzburg Fortress
Salzburg, Austria · built 1077
Hohensalzburg Fortress (Festung Hohensalzburg, lit. 'High Salzburg Fortress') is a large medieval fortress in the city of Salzburg, Austria. It sits atop the Festungsberg mountain at an altitude of 506 m. It was erected at the behest of the prince-archbishops of Salzburg. The fortress is 250 m (820 ft) long and 150 m (490 ft) wide making it one of the largest medieval castles in Europe.
Fort data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).