The remains of the Castle can be visited
Landsberg Castle

The castle ruin Landsberg, also known as Moschellandsburg, is a hilltop castle on the Moschellandsberg near Obermoschel in Rhineland-Palatinate. Its history dates back a long way.
History+
The castle was first documented in 1130 when Count Emicho von Schmidburg bequeathed it to Gerlach I von Veldenz. After the extinction of the Veldenz counts in the male line in 1444, the castle fell to Stephan von Pfalz-Simmern and later to the Palatinate-Zweibrücken line. Ludwig the Black, Stephan's son, owned the complex from 1453 to 1489 and expanded it into a fortress. During the Thirty Years' War, the castle suffered damage, was handed over to the Spanish in 1620, and occupied by Croats in 1622. In 1631, the Swedes moved in and used it as a barracks. In the War of the Palatinate Succession, King Louis XIV's troops destroyed the castle in 1689. In 1693, the original owners regained the ruin, which was declared national property during the French Revolution. Restoration work took place in 1977/78, followed by the construction of a shelter over the cellar vaults from 1981 to 1983. Since 2005, the city of Obermoschel, which now owns the castle, has been carrying out annual renovation and expansion work.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: http://www.wehrbauten.de/thread.php?threadid=1343
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: 49.7253, 7.7808