From 1794 to 1798, he was assigned as
attaché to the embassies in
Vienna,
Regensburg and
Rastatt. In 1799 he became
Ambassador in Copenhagen, from 1801 to 1804 he held the same post in
Saint Petersburg and from 1810 to 1830 at the
court of Vienna. This sealed the division of Saxony and ceded the former Saxon
Courlands to
Prussia. Schulenburg's property, the Klosterrode estate (which his grandfather Adolf Friedrich had acquired in 1739), also came to Prussia. In 1819, he took part in the
Carlsbad Conferences as his King's plenipotentiary. In the same year, he was entrusted with courting the hand of
Archduchess Marie Caroline of Austria for the then prince, later King
Frederick Augustus II. In 1828 he was appointed Conference Minister and, in October 1830, after the
small-state revolution in Saxony, he left the civil service, following his brother-in-law, Count Einsiedel, who had headed Saxony's foreign policy since May 1813 and on whose administration Schulenburg was said to have exerted considerable influence. After his retirement, lived mainly in Vienna, where he had considerable influence in the local salons. However, he spent his summers on his estate in Klosterrode, where he died of a heart attack in 1853. ==Personal life==