To be privately owned
Philippseich Castle (Dreieich)

Philippseich Castle in Dreieich, Offenbach district in Hesse, began in the 17th century with a hunting lodge. It later served as the residence of a collateral line of the County of Isenburg and is now privately owned.
The origins of Philippseich Castle date back to around 1675, when Count Johann Ludwig von Isenburg had a two-story wooden hunting lodge built in his game park. Under his son Johann Philipp, further buildings were constructed at the beginning of the 18th century, including the Green Building and a castle church, which thereafter served as the family crypt. After Johann Philipp's death in 1711, the collateral line Isenburg-Philippseich was founded, and the castle, named after him, developed into the center and residence of this partial county. Between 1794 and 1800, a new castle building in a simple mansard style was erected under Count Heinrich-Ferdinand. The castle remained in the family possession of the Isenburg-Philippseich line until 1920, after which it passed to the Isenburg-Birstein line. In 1941, it became private property and underwent renovation in the second half of the 20th century.
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: 49.9892, 8.7293