Prince Friedrich Sigismund of Prussia (1891–1927)

At Glienicke Castle, Prince Joachim Viktor Wilhelm Leopold Friedrich Sigismund was born to Prince Friedrich Leopold of Prussia and his wife Princess Louise Sophie of Schleswig-Holstein-Sonderburg-Augustenburg on 17 December 1891. He was their second child and eldest son; his siblings would come to include Princess Victoria Margaret, Prince Friedrich Karl, and Prince Friedrich Leopold. Like some other Hohenzollerns like Prince Heinrich of Prussia, Friedrich was greatly interested in aviation. In 1911, he began building an aeroplane at Glenicke Castle, with the hopes of trying it out the following spring. Later that year, his brother died from war wounds. ==Marriage and issue==

On 27 April 1916, he married at Jagdschloss Klein-Glienicke in Berlin Princess Marie Louise of Schaumburg-Lippe (b. 10 February 1897, Oldenburg - d. 1 October 1938, Potsdam) (a daughter of Prince Friedrich of Schaumburg-Lippe and Princess Louise of Denmark). They had two children: and secondly Adelheid von Bockum-Dolffs (born 16 September 1943). Died with no issue. ==Death==

He and his wife were great lovers of riding and horses, and he was considered one of the best horsemen in Germany. On 5 July 1927 at age 35 at Lucerne, Switzerland, Frederich Sigismund fell from a horse. ==Regimental commissions==

• 1. Garderegiment zu Fuß (1st Regiment of Foot Guards), Leutnant à la suite from 1901; Leutnant by 1908. • 2. Leib-Husaren-Regiment Königin Viktoria von Preußen Nr. 2, Rittmeister (captain of cavalry), during World War I • Fliegerabteilung 22 (aerial observer squadron), 1917–1918 ==Chivalric orders==

• Grand Cross of the Order of the Red Eagle, with Crown, 1901 • Knight of the Order of the Prussian Crown, 1st Class, 1901 • Grand Commander's Cross of the Royal House Order of Hohenzollern, 17 December 1901 ==Military decorations (1914-1918)==

• Iron Cross, Second Class • Iron Cross, First Class • Flugzeugführerabzeichen (Pilot's qualification badge) ==Ancestry==