The Treaty of Åbo or Treaty of Turku is a Peace Treaty between Imperial Russia and Sweden after the Hats' Russian War 1741-43. A treaty is a binding agreement under international law concluded by subjects of international law, namely states and international organizations. ... Imperial Russia is the term used to cover the period of Russian history from the expansion of Russia under Peter the Great, through the expansion of the Russian Empire from the Baltic to the Pacific Ocean, to the deposal of Nicholas II of Russia, the last tsar, at the start... The Kingdom of Sweden (Swedish: Konungariket Sverige  listen) is a Nordic country in Scandinavia, in Northern Europe. ...

Sweden ceded to Russia the areas east of the Kymi river and around Savonlinna, thus all the southern Karelia now belonged to Russia. The Kingdom of Sweden (Swedish: Konungariket Sverige  listen) is a Nordic country in Scandinavia, in Northern Europe. ... The Russian Federation (Russian: Росси́йская Федера́ция, transliteration: Rossiyskaya Federatsiya or Rossijskaja Federacija), or Russia (Russian: Росси́я, transliteration: Rossiya or Rossija), is a country that stretches over a vast expanse of eastern Europe and northern Asia. ... Savonlinna (Nyslott in Swedish, literally Newcastle) is a municipality of about 28,000 inhabitants in the southeast of Finland, in the heart of the Saimaa lake region. ... Finnish Karelia, historically also Swedish Karelia or Carelia, is a historical province in eastern Finland. ...

The Russian ruler guaranteed religion, properties, laws and privileges of the inhabitants of ceded territories. For example, these territories had just a few years earlier adopted (together with the rest of then-Sweden) the 1734 General Law of Sweden.