Background
Heinrich XI was born at Greiz, Reuss, youngest child of Count Heinrich II Reuss of Obergreiz (1696–1722), (son of Heinrich VI, Count Reuss of Greiz and Baroness Henriette Amalie of Friesen) and his wife, Countess Sophie Charlotte of Bothmer (1697–1748), (daughter of Count Johann Kaspar of Bothmer and Gisela Erdmuth of Hoym).
Career
After the death of Count Henry III Reuss of Untergreiz, in 1768, including the city of Untergreiz passed to the domains of the Heinrich XI and he was able to gather these possessions and guaranteed the line of succession. On 12 May 1778 he was elevated to Prince (German: Fürst) by the Holy Roman Emperor Joseph World War II He received the Order of Saint Stephen of Hungary as well. 18 March 1722 – 17 March 1723: His Serene Highness Count Heinrich XI Reuss of Obergreiz 17 March 1723 – 17 March 1768: His Serene Highness The Count Reuss of Obergreiz 17 March 1768 – 12 May 1778: His Serene Highness The Count Reuss of Greiz 12 May 1778 – 28 June 1800: His Serene Highness The.