Hansenberg Castle

"Hansenberg Castle was built in 1824 by the educator and Pestalozzi student Johannis de Laspeé from Johannisberg.
Johannes de Laspée, a mason's son from Johannisberg, was trained as a teacher by the Swiss Pestalozzi and founded a model school in Wiesbaden in 1809. This school was visited and criticized by Johann Wolfgang von Goethe in 1814, among others.
Having achieved modest prosperity, Johannes de Laspée, in 1823, fulfilled a heart's desire. He bought the winery on the Hansenberg in Johannisberg, north-west, above the village. A natural school and educational institution for orphans was to be built here. This became the structural core of today's castle. But before he could open his orphanage, he died in 1825 at the age of forty-two. At that time, the stately, beautifully structured complex consisting of a three-storey central wing with 5 axes and two five-axis pavilions was still under construction. Significant financial resources were still required for completion.
After de Laspeé's death, the building changed hands several times. On August 26, 1835, the Stettin Friedrich Ludwig Karl Baron von Medem bought the building together with the grounds and vineyards for 1,600 guilders. Then he sold it on October 23, 1836 to Karl August Graf von Reisach, head of the Koblenz Provincial Archive for 7,875 guilders. He in turn pledged it on May 11, 1837 to the wife of government secretary Hofman in Wiesbaden. In 1839 it was taken over by Egon Freiherr von Fürstenberg-Stammberg from Bonn.
In 1848, Johannes de Laspée's son, Heinrich de Laspée, tried to establish the orphanage there that his father had planned. He was assisted by a committee. However, he was just as unsuccessful with his idea as the brothers Anton and Josef Petri, together with Anton Reiff zu Sossenheim, who bought the house in 1854 to set up a sparkling wine factory. ...

... In 1860, the "Bad Johannisberg" corporation acquired the building, but sold it to Salomon Marix from Eltville the following year. His son Julius essentially gave the building the appearance of a noble French villa after he had bought it back in 1871 from the owner Karl Krass from Eltville in 1865.
Then, in 1872, Consul Ludwig Bauer took over the property for 50,000 guilders. Bauer was the owner of the Moscow wine shop L. Bauer & Co. He had the palace embellished and laid out the linden avenue on the road to Stephanshausen. On the south side, a terrace almost a hundred meters wide was created with a fantastic view. The property remained in his family's possession until the early 1930s.
The following owners, the married couple Georg Weitlauf from Johannisberg and the married couple Hans Reus from Eltville, jointly ran a wine shop and a hotel restaurant there.
After World War II, the site was acquired by the Federal Republic of Germany and a "disaster control school" with extensive outbuildings was built.
In 2001, the state of Hesse bought the property. In a 2-year construction period, the boarding school "Schloss Hansenberg" was built there for gifted students.
In the course of its approx. 180-year history, Schloss Hansenberg was, among other things, a winery, wine shop, hotel and restaurant, Hessian disaster control school, state fire brigade school and finally a boarding school.
The site is thus being used again for its original purpose, albeit not in the spirit of de Laspée for orphans, but as a school for the gifted."
weindorf-johannisberg.de/johannisberg/johannisberg_schloss-hansenberg.htm

You can only walk around the castle (school grounds), but from below you have a great view over the vineyards and Geisenheim to the south/southwest (Rheinhessen)