Germany–Poland border Germany–Poland border The Germany–Poland border (, ), the state border between Poland and Germany, is currently the Oder–Neisse line. It has a total length of and has been in place since 1945. It stretches from the Baltic Sea in the north to the Czech Republic in the south. Nevertheless, the border has not always followed this line, and it has a long and often volatile history. The Germany–Poland border traces its origins to the beginnings of the Polish state, with the Oder (Odra) and Neisse (Nysa) rivers (the Oder–Neisse Line) being one of the earliest natural boundaries between Germany and
Finland–Sweden border in a topographical description made in 1811. The border was decided to run through the geographical centre of the island (defined by coordinates) in the treaty of Åland in 1921 and in the treaty of continental plates in 1972. The Märket lighthouse, built in 1885 by Finland and operated by them, was left on the Swedish side. In 1981, the border on the island was modified into a curve to get the lighthouse on the Finnish side. The border is agreed to be regularly inspected every 25 years. During the independence of Finland, inspections have been made in 1926–1927, 1956–1957,