The Castle can be partly visited
Salzburg Castle

Salzburg Castle majestically crowns the edge of a plateau above Bad Neustadt an der Saale in Lower Franconia. This impressive joint-heritage castle, still partly inhabited today, is one of the largest of its kind in Central Europe and offers a fascinating glimpse into Bavaria's medieval history.
History+
Already in Carolingian times, the Salzgau around Neustadt was significant, and a palatinate was established, which Emperor Otto III donated to the Diocese of Würzburg in the year 1000. The first written mention of Salzburg Castle itself is found in a document of Emperor Louis the Pious, copied around 1160. From about 1170, the gradual expansion of the fortress into one of Central Europe's largest joint-heritage castles and an important administrative center began. Around 1200, the first Würzburg ministeriales at Salzburg Castle are traceable by name. In 1232, the 'new town' of Neustadt, located at the foot of the castle, was first mentioned in a document, after which the administrative seat was gradually moved there.
Source: Wikipedia · Licence: CC BY-SA 4.0
This description draws on the facts documented in the linked Wikipedia article; Wikipedia content is licensed under CC BY-SA 4.0. Wording and editing: Mobile History.
Location: 50.3205, 10.2300