Cecilienhof palace was built by the Hohenzollern family. Wilhelm II of Germany
built it for his son Crown Prince Wilhelm of Germany and the crown princess wife
Duchess Cecilie of Mecklenburg-Schwerin.
Sanssouci was the summer residence of Frederick the Great, King of Prussia. The palace was built after plans of the king himself by architect Knobelsdorff in 1745 as a ''Maison de Plaisance''.