The Steinsches Schloss is a town palace located in the center of Nassau. It served as the residence of the noble family vom Stein and was, among others, where the Prussian reform minister Heinrich Friedrich Karl vom und zum Stein grew up.
The predecessor of the castle was a tithing farm (Zehnthof), which the vom Stein family had owned since the 14th century. At the outset of the Thirty Years' War, the now prosperous and influential family relocated their seat from the Steinsche Burg outside Nassau to this complex. Over the ensuing centuries, the former farm was transformed and expanded into a castle.
By 1621, the main building was completed in the style of Late Renaissance. In 1755, two Baroque wings were added. Heinrich Friedrich Karl vom und zum Stein commissioned the Wiesbaden architect Christian Zais and later, in 1818, the master builder Johann Claudius von Lassaulx for an expansion to commemorate the Wars of Liberation. In 1815/16, an octagonal Neo-Gothic tower was added. A source indicates that during the 19th century, stained glass windows from the St. Kastor Church (Dausenau) were 'relocated' to the tower.
Following preliminary investigations in the years 2011-2012, the tower was extensively restored with funds from the state of Rhineland-Palatinate by 2018. In the ground floor, the marble baths intended for ritual cleansing before entering the memorial were restored, and a chapel originally planned there was established after 200 years. The Baron's study on the middle floor, with its walk-in library shelves, and the cult site on the upper floor, with sculptures of the three monarchs Friedrich Wilhelm III, Franz I, and Alexander I by Christian Daniel Rauch, were returned to their original condition.
The castle is owned by the female descendants of the vom Stein family, the Counts of Kanitz. The Castle Cappenberg, where Baron vom und zum Stein lived for many years and which he chose as his retirement residence, is also owned by the Counts of Kanitz through inheritance.
Château de Niort is a medieval castle in the French town of Niort. It consists of two square towers, linked by a 15th-century building and dominates the Sèvre Niortaise valley.
The two donjons are the only remaining part of the castle. The castle was started by Henry II Plantagenet in the 12th century and completed by Richard the Lionheart. It was defended by a rectangular curtain wall and was damaged during the Wars of Religion. In the 18th century, the castle served as a prison.
The present keeps were the central point of a massive fortress. The southern keep is 28m tall, reinforced with turrets. The northern tower is slightly shorter at 23m. Both are flanked with circular turrets at the corners as well as semicircular buttresses. Each of the towers has a spiral staircase serving the upper floors. The Romanesque architecture is of a high quality with the dressed stones closely jointed.