Carl Gustaf Tessin

Carl Gustaf Tessin (5 September 1695 – 7 January 1770) was a Swedish Count and politician and son of architect Nicodemus Tessin the Younger and Hedvig Eleonora Stenbock. He was one of the most brilliant personages of his day, and the most prominent representative of French culture in Sweden. He was also a fine orator.

Tessin's art collection became the original core of the collection of Sweden's Nationalmuseum.

Carl Gustaf Tessin was born in . His father's family were burghers, while his mother came from the nobility; one of his maternal great-great-grandmothers had been born a princess-duchess of Brunswick-Luneburg. This genealogy led some to regard him as "trash" and a social climber compared to real aristocracy. On the other hand, members of his paternal line had shown high talent artistically and aesthetically; designers, architects, and also political talent. He married Ulrika Sparre in 1727.

He began his public career in 1723, at which time he was a member of the Holstein faction, which promoted the claims of the young Duke Carl Frederick of Holstein to the Swedish throne. In 1725 Tessin was appointed ambassador at Vienna, and in that capacity counteracted the plans of the Swedish chancellor, Count Arvid Horn, for joining the anti-Russian Hanoverian Alliance.

During the riksdags of 1726–27 and 1731, Tessin fiercely opposed the government, and his wit, eloquence, and imposing presence made him one of the foremost protagonists of the party subsequently known as "The Hats". From 1735 to 1736 he was again Swedish ambassador at Vienna. During the riksdag of 1738 he was elected marshal of the Riksdag of the Estates and contributed more than anyone else to the overthrow of the Horn administration the same year.