Born: December 24, 1761, Pamūšis, Lithuania
Died: May 26, 1818 (age 56 years), Chernyakhovsk, Russia
Place of burial: Barclay de Tolly Mausoleum, Jõgeveste, Estonia
Children: Magnus, Fürst Barclay de Tolly
Awards: Golden Weapon for Bravery, Order of the Bath, Order of the Red Eagle, and more
Previous office: Minister of War of the Russian Empire (1810–1812)
Nationality: Russian