Famous Celebrity from Potsdam Prussia Princess Louise Margaret of Prussia (57 years)Sophia of Prussia (62 years)Frederick III, German Emperor (57 years)Ernst Haeckel (85 years)Princess Charlotte of Saxe-Altenburg (90 years)Wilhelm Windelband (67 years)Prince Wilhelm of Prussia (1906â1940) (34 years)Princess Marie Elisabeth of Saxe-Meiningen (70 years)Prince Oskar of Prussia (70 years)Prince Adalbert of Prussia (1884â1948) (64 years)Prince Joachim of Prussia (30 years)Prince Eitel Friedrich of Prussia (59 years)Frederick William III of Prussia (70 years)Georg Moritz, Hereditary Prince of Saxe-Altenburg (91 years)Ludwig Yorck von Wartenburg (71 years)Moritz von Jacobi (73 years)Princess Rosemary of Salm-Salm (97 years)