Treaty of Abo

Treaty of Åbo

Old Finland. The area in yellow was given to the Russian empire.
Signed	18 August 1743 (1743-08-18)
Location	Turku, Sweden
Original signatories	Russia Sweden

The Treaty of Åbo or the Treaty of Turku was a peace treaty signed between the Russian Empire and Sweden in Turku (Swedish: Åbo) on 7. August^jul./ 18. August^greg. 1743 in the end of the Russo-Swedish War of 1741-1743.

By the end of the war, the Imperial Russian Army had occupied most of Finland, prompting Field-Marshal Trubetskoy and Chancellor Aleksey Bestuzhev to demand the application of uti possidetis principle in this case. By acquiring Finland, Russian politicians aspired to move the Swedish border considerably to the north, thus reducing the danger of Swedish attack on the Russian capital, Saint Petersburg. In the hope of gaining independence, the Finnish estates offered the ephemeral throne of their country to Duke Peter of Holsten-Gottorp, the heir apparent to the Russian Crown.

Another party at the Russian court, represented by pro-Swedish and Peter's Holsteinian relatives, proposed to return Finland to the Swedes in recompense for having his uncle, Adolf Frederick of Holstein-Gottorp, elected as heir to the throne of Sweden. Empress Elizabeth of Russia lent her support to the latter faction, partly because she fondly remembered Adolf Frederick's brother, her projected spouse who had died several months before the wedding could take place (in June 1727).