He served 20 years (1862–1882) as the
Governor General of Caucasia, being seated in
Tbilisi, the town which most of his children remembered as the home of their childhood. In the
Russo-Turkish War of 1877–1878, he was nominal Commander-in-Chief of the Russian troops in the Caucasus and was appointed Field Marshal General in April 1878. In the course of his life, four members of his family ruled as Emperors of Russia: his father, Nicholas I; his brother,
Alexander II; his nephew,
Alexander III; as well as his grand-nephew,
Nicholas II, whose second daughter,
Grand Duchess Tatiana, the Grand Duke was godfather to. He died in
Cannes, France, on 18 December 1909. He was the last surviving legitimate grandchild of
Paul I of Russia. == Legacy ==