The Landsmannschaft Schlesien - Nieder- und Oberschlesien e.V. ("Territorial Association of Silesia - Lower and Upper Silesia", "Homeland Association of Silesia - Lower and Upper Silesia") is an organization of Germans born in the former Prussian provinces of Lower and Upper Silesia, and their descendants, who currently live in Germany. The Landsmannschaft Schlesien was established in March 1950 and is a member of the Federation of Expellees, and has its headquarters in Königswinter, North Rhine-Westphalia.