Background
Heinrich XX was born at Offenbach, Landgraviate of Hesse-Darmstadt, younger surviving son of Heinrich XIII, (1747–1817), (son of Heinrich XI, and Countess Conradine Reuss of Köstritz) and his wife, Princess Wilhelmine Louise of Nassau-Weilburg (1765–1837), (daughter of Charles Christian, Prince of Nassau-Weilburg and Princess Carolina of Orange-Nassau).
Career
Heinrich XX kept the principality administration based on absolutist principles at least until 1848 when because of the Revolution, was forced to issue a constitution but never came into force. The Prince, however, distinguished himself in military service in favor of the Austrian Empire. 29 June 1794 – 31 October 1836: His Serene Highness Prince Heinrich XX Reuss of Greiz 31 October 1836 – 8 November 1859: His Serene Highness The.