Finland–Sweden border border continues south into the northern Baltic Sea to a point where it meets the zone border of Estonia. The tripoint between the economic zones is defined by a treaty signed in 2001. The Finnish–Swedish border was created in 1809 by the Treaty of Fredrikshamn, as Sweden ceded Finland over to Russia. The course of the border was described in the fifth article of the treaty, without great detail. The borders were agreed to be the Sea of Åland, the Gulf of Bothnia, and the rivers Tornionjoki and Muonionjoki. Islands in the sea belonged to whichever country was the nearest
Finland–Norway border negotiation. Cairns were erected after that with the last one at Nesseby in 1766. After Finland became a Grand Duchy of Russia, and the independent Kingdom of Norway was evoked into but in personal union with Sweden under the Swedish King, a treaty was again negotiated in 1816 with Russia. Defining the easternmost part of the borderzone. Between 1920-1944, the Petsamo area belonged to Finland, so the Finland–Norway border extended along the present Norway–Russia border to the ocean. The 1751 treaty also granted the Sami people the right to cross the border freely including their reindeer, as they always had