The Hohenburg, also called Homburg Castle or Fortress Hohenburg, is a ruined castle located Homburg in the Saarpfalz district in Saarland, Germany. It stands atop the 325 metres-high Schlossberg above the Schlossberg Caves.
In the 12th century the castle was the seat of the counts of Homburg. In 1330 the received city rights for their village at the foot of Schlossberg from the Emperor Ludwig the Bavarian. After the death of the last Count of Homburg in 1449 castle and city fell to the counts of Nassau-Saarbrücken. They rebuilt the castle in the second half of the 16th century into a renaissance palace, and then to a fortress.
Wikipedia https://en.wikipedia.org/wiki/Hohenburg_Castle_(Homburg)
Address Schloßberg-Höhen-Straße, 66424, Germany
Coordinates 49°19'14.134" N 7°20'39.504" E