Hohensalzburg Fortress (German: Festung Hohensalzburg, lit. 'High Salzburg Fortress') is a large medieval fortress in the city of Salzburg, Austria. It sits atop the Festungsberg at an altitude of 506 m.[1] 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.