Lusatian Neisse

The Lusatian Neisse (; ; ; Upper Sorbian: ''Łužiska Nysa''; Lower Sorbian: ''Łužyska Nysa''), or Western Neisse, is a river in northern Central Europe. It rises in the Jizera Mountains, near Nová Ves nad Nisou, at the Czech border becoming the Polish–German border for its remaining , to flow into the similarly northward-flowing Oder from the left.

Its drainage basin covers , of which is in Poland, the rest is mainly in Germany. The river reaches the tripoint of the three nations by Zittau, a German town/city, after , leaving the Czech Republic. It is a left-bank tributary of the Oder, into which it flows between Neißemünde-Ratzdorf and Kosarzyn – north of the towns of Guben and Gubin. The river was a motivations to found Gubin as a craftmanship and trading port in the 13th Century.

Since the 1945 Potsdam Agreement in the aftermath of World War II, the river has partially demarcated the German-Polish border (along the Oder–Neisse line). The German population east of the river was expelled from Poland to Germany.

It is the longest and most watered of the three rivers of its non-adjectival name in both the main languages (the two other rivers being the Eastern Neisse (; ) and Raging Neisse (Polish: ''Nysa Szalona''; German: ''Wütende Neiße'' or ''Jauersche Neiße'')). It is usually simply referred to as the Neisse. Provided by Wikipedia