Headquarters of the Medical command II (German Army)
Oranienstein Castle

Oranienstein Castle in Diez an der Lahn was constructed as a dowager's residence and is today one of the ancestral castles of the Dutch royal family. It is a building of Baroque architecture.
History+
The origins of Oranienstein Castle date back to 1672, when it was built on the ruins of the former Benedictine monastery of Dierstein. It served as a dowager's residence for Countess Albertine Agnes of Orange-Nassau. Between 1704 and 1709, under Henriette Amalie, Albertine's daughter-in-law, the castle underwent a transformation into a Baroque palace. The plans for this came from Daniel Marot, a French architect who also contributed to Versailles. During this period, the five-winged building was created, adorned with stucco by Eugenio Castelli and Antonio Gentone, and frescoes by Jan van Dyk. After 1743, Oranienstein temporarily lost its importance as a residence, but was used again from 1801 by William V of Orange, who also commissioned Friedrich Ludwig von Sckell for the garden design.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: http://www.wehrbauten.de/thread.php?threadid=932
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: 50.3837, 8.0107