Who is a Polish politician that was also famous for performing Piano Concerto No. 4 by Anton Rubinstein?
Ignacy Jan Paderewski Ignacy Jan Paderewski, GBE (] ; 18 November [O.S. 6 November] 1860  – 29 June 1941) was a Polish pianist and composer, politician and spokesman for Polish independence. He was a favorite of concert audiences around the world. His musical fame opened access to diplomacy and the media.
Maurycy Klemens Zamoyski Count Maurycy Klemens Zamoyski (1871–1939) was a Polish nobleman (szlachcic), politician, social activist, and Minister of Foreign Affairs in the Polish government of the 1920s.