To be privately owned
Heimburg Castle
The Heimburg, also known as Hohneck Castle, is a medieval castle complex on a rocky outcrop above Niederheimbach in the Mainz-Bingen district of Rhineland-Palatinate. As part of the UNESCO World Heritage Upper Middle Rhine Valley, it offers a striking sight on the Rhine.
History+
The construction of the Heimburg, also known by names such as Haineck or Heyenburg, took place between 1294 and 1305. It served the Archbishop of Mainz as a border castle to secure his property in Niederheimbach, which at that time formed an enclave of the Electorate of Mainz, surrounded by Palatine lands. In 1315 and again from 1326 to 1328, the castle's fortifications were strengthened. After the Count Palatine relinquished his claims in favor of the Electorate of Mainz in 1344, the Heimburg quickly lost its strategic importance. Until 1438, it served as the seat of a Mainz lower court. It was destroyed during the Palatine War of Succession.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: https://commons.wikimedia.org/wiki/File:Heimburg_1.JPG
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: 50.0339, 7.8066