....."Pyotr was educated at Page Corps, graduating in 1874 with first-class honours, and was appointed Page of the Chamber. In 1875, he became a cornet at Her Empress Leib-Guards Hussars. He took part in the Russo-Turkish War, 1877–78 and was decorated for valour in the Battle of Kars. Then he studied at the General Staff Academy and graduated in 1881. In 1884, he was made the acting commander of the staff of 31st Infantry division, and in 1887, he was appointed to commander of staff of 3d Grenadier division. In 1895, he was appointed the governor of Penza, and in 1897 the governor of Yekaterinoslav and established a base for a political career. In 1905 he retired from Government life and lived in retirement until his death on 16 May 1914".......
His family is not provided in source material but he is known to be the father of the literary historian Dmitry Petrovich Svyatopolk-Mirsky (D. S. Mirsky).
Have you taken a DNA test for genealogy? If so, login to add it. If not, see our friends at Ancestry DNA.