Fredrikshamn Treaty
The Treaty of Fredrikshamn ( Swedish Freden i Fredrikshamn , Finnish Haminan rauha ) ended the Russo-Swedish war between Russia and Sweden . It was closed on September 17, 1809 in Fredrikshamn (today Hamina ).
Sweden ceded Finland, the Åland Islands and parts of Lapland and Västerbotten to Russia, which formed the autonomous Grand Duchy of Finland from these areas with its own administration under the rule of the Russian Tsar . A curiosity of the treaty is the division of the only 0.03 km² large island of Märket , which still exists today.
The Treaty of Fredrikshamn is also known in German under the names Friede von Fredrikshamn and Treaty of Hamina .