Swedish baron G.M. Sprengtporten in Russian service, 1786-1809

General of the Infantry Count G.M. Sprengtporten (1740-1819) is one of the less known historical figures of the last quarter of the 18th and of the early 19th century. As a Swedish citizen, he hatched plans to turn Finland into an independent state. In the mid-1780s he saw in Catherine II a potential ally who could implement his ideas. After accepting the invitation to enter Russian service, Sprengtporten did not blend either in the Highest Court or in the Russian army. Not having shown any significant military feats during the wars of the late 18th and early 19th centuries, he distinguished himself in the diplomatic and lawmaking field. An important event was his mission to Europe (1800-1801), which resulted in the return of more than six thousand Russian prisoners to Russia. The draft “Regulations on the Establishment of the Main Administration in New Finland”, developed by Sprengtporten with some changes made by Emperor Aleksander I, became the cornerstone of Finnish autonomy within the Russian Empire over the next century. Occupying for a short time the post of Governor General, he became a link between Finland and Russia. The scientific novelty of the article lies in the comprehensive presentation of the Russian service of G.M. Sprengtporten. The article is written on the basis of published sources and unpublished documents from some central archives, which are introduced into scientific circulation for the first time.