His father was State Councilor Yakov Stepanovich Mirkovich and his mother was Marya Gavrilovna Golova.
[2][3] Alexander graduated from the prestigious Corps of Pages of His Majesty in St. Petersburg in 1810, where his name is enshrined on a marble plaque.
[1] On February 14, 1812, in the midst of the Allied invasion of Napoleonic France, Aleksandr Mirkovich, a junior officer in the Life Guard Horse Regiment, about to celebrate his twenty-second birthday, received his baptism of fire.
In 1817, on the occasion of the move of the royal court to Moscow, where Alexander I intended to have a long stay, Mirkovich was in that division of the cavalry guards who joined the Moscow Guards Detachment, and on October 12 of that year, was present at the laying of the foundation for the new Cathedral of Christ the Saviour.
Some 66 years later, it was Mirkovich, among the very few surviving veterans of the Patriotic War, who received an invitation to attend the solemn consecration of this temple.