What is the name of the largest medieval castle of Austria shown in the picture?

Hohensalzburg Fortress (German: Festung Hohensalzburg, lit. 'High Salzburg Fortress') sits atop the Festungsberg, a small hill in the Austrian city of Salzburg. Erected at the behest of the Prince-Archbishops of Salzburg with a length of 250 m (820 ft) and a width of 150 m (490 ft), it is one of the largest medieval castles in Europe. Hohensalzburg Fortress is situated at an altitude of 506 m.

Construction of the fortress began in 1077 under Archbishop Gebhard von Helfenstein. The original design was a basic bailey with a wooden wall. In the Holy Roman Empire, the archbishops of Salzburg were already powerful political figures and they expanded the fortress to protect their interests. Prince-Archbishop Leonhard von Keutschach further expanded the fortress during his term from 1495 until 1519.

Hohensalzburg Fortress was refurbished from the late 19th century onwards and became a major tourist attraction with the Festungsbahn funicular railway, opened in 1892, leading up from the town to the Hasengrabenbastei. It stands today as one of the best preserved castles in Europe.