To be privately owned
Heddersdorf Manor

The Heddersdorf’sche Adelshof in Groß-Umstadt, located in the Darmstadt-Dieburg district in Hesse, is a former manor and estate house. It is the smallest of the city's seven former noble residences and emerged from a late medieval castle from the 13th century. Its current appearance is shaped by a manor house from the late 16th century.
History+
Originally, in the 13th century, the Heddersdorf’sche Adelshof was the first castle seat of the Wambolt von Umstadt family and was known as the “Old Wambolt's Court.” After the death of the last male descendant of the Umstadt line in 1558, the property passed to Regina Wambolt von Umstadt through inheritance and settlement. She bequeathed it to her sister Anna, who was married to Ulrich von Hedersdorf. From 1570, the manor became the ancestral property of the Hedersdorf family's Umstadt line. After this line died out in 1658 and due to indebtedness, the estate passed into various private hands. In 1742, the Landgraviate of Hesse-Darmstadt acquired the property and used it as a Lutheran parsonage. In 1849, it was privatized by the Grand Duchy of Hesse and came into bourgeois hands, where it has remained to this day.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: http://www.wehrbauten.de/thread.php?threadid=971
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: 49.8689, 8.9279