 Although King Gustavus Adolphus of Sweden had founded the Academia Gustaviana in 1632, it had ceased to exist in 1710 when Peter the Great had conquered the Baltic Sea provinces.Only in 1802 was the university re-founded by the order of the Tsar Alexander I as the only German-language and Lutheran university in the Russian Empire.Parrot was initially appointed to the Chair of Pure and Applied Mathematics but after defending his doctoral dissertation “On the influence of Physics and Chemistry on Pharmacy” ("Über den Einfluss den Physic und Chemie auf die Arzneikunde") in 1802, he was appointed to the Chair of Physics.