From Wikipedia: Rosa Luxemburg (Polish: Róża Luksemburg [ˈruʐa ˈluksɛmburk] ⓘ; German: [ˈʁoːza ˈlʊksm̩bʊʁk] ⓘ; born Rozalia Luksenburg; 5 March 1871 – 15 January 1919) was a Polish and naturalised-German revolutionary socialist, orthodox Marxist, and anti-war activist. She became a key figure of the revolutionary socialist movements of Poland and Germany during the late 19th and early 20th century.