Louis I, Grand Duke of Hesse
In 1776, he became engaged to Sophie Dorothea of Württemberg, eldest daughter of Frederick II Eugene, Duke of Württemberg. The engagement was broken off so that Sophia Dorothea could marry Louis's recently widowed brother-in-law Tsarevich Paul Petrovich, son and heir of Catherine II "the Great", Empress of Russia. He received a monetary compensation when the engagement was broken.
Monbijou Palace
From 1712 the little palace served as the summer residence of Sophia Dorothea of Hanover, who in 1706 married Frederick William I of Prussia, the son and successor of Frederick I. Both she and her father-in-law are attributed with naming the palace "Monbijou", from the French "mon bijou" ("my jewel"). In 1717 tsar Peter the Great of Russia and his court lodged at Monbijou for two days while traveling abroad. According to contemporary reports, the Russian guests left the property in "a complete mess" after their departure. Dorothea's son, Frederick the Great, had the palace modernized and considerably enlarged as soon as he had acceded to the throne. His architect, Georg Wenzeslaus von Knobelsdorff, superintendent of all royal buildings and architect of Sanssouci, had new extensions and outbuildings erected which extended the original size of the grounds by several times on the Spree river side. In 1742 the "Berlinische(n) Nachrichten" reported that the keys had been turned over to the queen mother, which "delighted her immensely". Dorothea spent the summer months at Monbijou, giving formal dinners, masquerade balls and concerts there, pleasures she had long done without under the Spartan reign of Frederick William I. The palace had its own jetty, since the court members often preferred to arrive in comfort via the waterways instead of being jarred over rough roads.