Gustav Ernst von Stackelberg
Graf Gustav Ernst von Stackelberg (Russian: Густав Оттонович Стакельберг) (5 June 1766, Reval, Governorate of Estonia – 18 April 1850, Paris, France) was a Russian diplomat of Baltic-German descent, and was the son of Otto Magnus von Stackelberg.
As a Lieutenant in the Russian armed forces he fought in the Russo-Swedish War against King Gustav III of Sweden. After he left the army, he became a diplomat of the Russian court, initially as a chamber junker of Empress Catherine the Great.
After the defeat of France in the Napoleonic Wars,as ambassador to the Austrian Empire he was a member of the Russian delegation to the Congress of Vienna (1814–15) along with prince Razumovski, count Nesselrode and count Capo d Istria. In this capacity he was pivotal in the absorption of most of the Duchy of Warsaw into the Russian Empire as the Kingdom of Poland.
After a long career as a diplomat, he was awarded the Order of St. Andrew, and spent his retirement in Paris, where he died in 1850.
- (in German) Gustav Ernst Graf von Stackelberg (1766 - 1850)