Count Hermann Karl von Keyserling (1697–1764) was a Russian diplomat from the Keyserlingk family of

Baltic German Baltic Germans ( or , later ) are Germans, ethnic German inhabitants of the eastern shores of the Baltic Sea, in what today are Estonia and Latvia. Since Flight and expulsion of Germans (1944–1950), their resettlement in 1945 after the end ...

nobility based in the

Duchy of Courland and Semigallia The Duchy of Courland and Semigallia was a duchy in the Baltic states, Baltic region, then known as Livonia, that existed from 1561 to 1569 as a nominal vassal state of the Grand Duchy of Lithuania and subsequently made part of the Crown of th ...

Life

In 1733, the nobility of Courland sent Keyserling to

Saint Petersburg Saint Petersburg, formerly known as Petrograd and later Leningrad, is the List of cities and towns in Russia by population, second-largest city in Russia after Moscow. It is situated on the Neva, River Neva, at the head of the Gulf of Finland ...

in order to inform

Ernst Johann von Biron Ernst Johann von Biron (; ; ) was the duke of Courland and Semigallia from 1737 to 1740 and again from 1763 to 1769. He was also briefly the regent of the Russian Empire in 1740. Early years Biron was born as Ernst Johann von Bühren in Ka ...

that he had been elected Duke of Courland. Biron was so pleased with the news that he had Keyserlingk appointed President of the

Saint Petersburg Academy of Sciences The Russian Academy of Sciences (RAS; ''Rossíyskaya akadémiya naúk'') consists of the national academy of Russia; a network of scientific research institutes from across the Russian Federation; and additional scientific and social units such ...

. A year later, Keyserling was appointed Ambassador of the

Russian Empire The Russian Empire was an empire that spanned most of northern Eurasia from its establishment in November 1721 until the proclamation of the Russian Republic in September 1917. At its height in the late 19th century, it covered about , roughl ...

at the court of

August III Augustus III (; – "the Saxon"; ; 17 October 1696 5 October 1763) was King of Poland and Grand Duke of Lithuania from 1733 until 1763, as well as Elector of Saxony in the Holy Roman Empire where he was known as Frederick Augustus II (). He w ...

in Dresden and Warsaw. He kept this position until his death. As the Russian ambassador to the imperial court in Vienna he was made an imperial count in 1744.

Johann Sebastian Bach Johann Sebastian Bach (German: Help:IPA/Standard German, �joːhan zeˈbasti̯an baχ ( – 28 July 1750) was a German composer and musician of the late Baroque music, Baroque period. He is known for his prolific output across a variety ...

was said by his first biographer,

Johann Nikolaus Forkel Johann Nikolaus Forkel (22 February 1749 – 20 March 1818) was a German musicologist and music theorist, generally regarded as among the founders of modern musicology. His publications include the two-volume ''Allgemeine Geschichte der Musik'' ...

, to have composed the

Goldberg Variations The ''Goldberg Variations'' (), BWV 988, is a musical composition for keyboard by Johann Sebastian Bach, consisting of an aria and a set of thirty variations. First published in 1741, it is named after Johann Gottlieb Goldberg, who may ...

for Count Keyserling as a sleep aid. The work takes its name from Johann Gottlieb Goldberg, a musician in the service of Count Keyserling. His son Heinrich Christian von Keyserling was the wealthiest aristocrat of

Königsberg Königsberg (; ; ; ; ; ; , ) is the historic Germany, German and Prussian name of the city now called Kaliningrad, Russia. The city was founded in 1255 on the site of the small Old Prussians, Old Prussian settlement ''Twangste'' by the Teuton ...

, whose palace was frequented by the likes of

Immanuel Kant Immanuel Kant (born Emanuel Kant; 22 April 1724 – 12 February 1804) was a German Philosophy, philosopher and one of the central Age of Enlightenment, Enlightenment thinkers. Born in Königsberg, Kant's comprehensive and systematic works ...

and

Johann Gottfried Herder Johann Gottfried von Herder ( ; ; 25 August 174418 December 1803) was a Prussian philosopher, theologian, pastor, poet, and literary critic. Herder is associated with the Age of Enlightenment, ''Sturm und Drang'', and Weimar Classicism. He wa ...

. His marriage to Caroline von Keyserling was childless. Hermann Karl's daughter Anna von Medem was the great-grandmother of geologist

Alexander Keyserling Alexander Friedrich Michael Lebrecht Nikolaus Arthur Graf von Keyserling (15 August 1815 – 8 May 1891) was a Baltic German geologist and paleontologist from the Keyserlingk family of Baltic German nobility. Career Alexander von Keyse ...

. 1697 births 1764 deaths People from the Duchy of Courland and Semigallia Baltic-German people from the Russian Empire Ambassadors of the Russian Empire to Austria Ambassadors of the Russian Empire to Prussia Full members of the Saint Petersburg Academy of Sciences 18th-century German historians Politicians from the Russian Empire 18th-century diplomats of the Russian Empire German male non-fiction writers Active Privy Councillor (Russian Empire) Ambassadors of the Russian Empire to Poland {{Russia-diplomat-stub