What German doctor was also friends with Schack Carl Rantzau?
Schack Carl Rantzau Schack Carl, "rigsgreve" (von) Rantzau or Carl Schack Rantzau-Ascheberg (11 March 1717, Ascheberg estate, Holstein – 21 January 1789, Menerbes, France) was a Holstein-born Danish officer and statesman. He is notable for his friendship with Johann Friedrich Struensee and his role in the coup which led to Struensee's fall from power.
Daniel Gottlieb Messerschmidt Daniel Gottlieb Messerschmidt (Russian: Да́ниэль Го́тлиб Ме́ссершмидт ) (September 16, 1685 – March 25, 1735) was a German physician, naturalist and geographer. He was born in Danzig and studied medicine in Jena and Halle, obtained his doctorate degree in the latter in 1713 and settled as a medical doctor in Danzig. In 1716, he came into contact with Russian emperor Peter the Great. By decree of November 5, 1718, Peter gave Messerschmidt the task to ”collect rarities and medicinal plants” from Siberia.