The Treaty of Åbo, or the Treaty of Turku, was a peace treaty signed between the Russian Empire and Sweden in Åbo (Turku) on 18 August [O.S. 7 August] 1743 in the end of the Russo-Swedish War of 1741–1743.
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👉 Treaty of Åbo in the context of Old Finland
Vyborg Governorate was an administrative-territorial unit (guberniya) of the Russian Empire, established in 1744 from territories ceded by Sweden to Russia in two successive conflicts: the Great Northern War (1700–1721), concluded by the Treaty of Nystad, and the Russo-Swedish War (1741–1743), concluded by the Treaty of Åbo. These areas were initially attached to the Saint Petersburg Governorate before being reorganized as a separate governorate with its capital in Vyborg (Viipuri).
The region was later dubbed Old Finland to distinguish it from the parts of Finland which remained under Swedish rule. Following Russia's victory in the Finnish War (1808–1809), Sweden ceded the rest of Finland. The newly conquered regions were organized as the autonomous Grand Duchy of Finland ("New Finland"). In 1812, Old Finland was incorporated into the Grand Duchy as Vyborg Province.
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Treaty of Åbo in the context of Treaty of Värälä
The Treaty of Värälä (sometimes known as the Treaty of Wereloe) was signed in Värälä, Elimäki Municipality, Finland, between Russia (represented by Otto Heinrich Igelström) and Sweden (represented by Gustaf Mauritz Armfelt). It was signed on 14 August 1790 and concluded the Russo-Swedish War. The treaty confirmed status quo ante bellum with respect to the borders; however, Russia's right to interfere with Swedish interior affairs from the Treaty of Nystad was expressly revoked. The provisions of the previous Treaty of Åbo were basically confirmed.
A year later, on 19 October 1791, a convention was signed in Stockholm, whereby the countries pledged to assist each other in case of foreign attack. The treaty anticipated the First Coalition in its being directed against Revolutionary France. Catherine bound herself to pay her new ally annual subsidies amounting to 300,000 rubles. Gustav III had sent to his cousin, Catherine II of Russia, a letter in which he besought her to "forget the war as a passing cloud" and invoked their common blood as his claim to enjoy amitie with his cousin.