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 Finland–Norway border The border between Norway and Finland is long. It is a land and river border between two tripoints. The western tripoint is marked by Treriksröset, a stone cairn where both countries border Sweden. The eastern tripoint is marked by Treriksrøysa, a stone cairn where both countries border Russia. The border was defined in a treaty from 1751, but was then a part of the border between the Kingdom of Sweden, ruling Finland, and the Crown of Denmark, ruling Norway. In the period 1738-1751 there were field investigations and negotiations on the border, although the Finnish part needed less