Solitude Palace (German: Schloss Solitude) is a Rococo schloss and hunting retreat commissioned by Charles Eugene, Duke of Württemberg. It was designed by Johann Friedrich Weyhing [de] and Philippe de La Guêpière, and constructed from 1764 to 1769. It is located on an elongated ridge between the towns of Leonberg, Gerlingen and Stuttgart in Baden-Württemberg.
https://en.wikipedia.org/wiki/Solitude_Palace
48°47′13″N 9°5′3″E