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.
Wincenty Rzymowski Wincenty Rzymowski (19 July 1883 in Mława – 30 April 1950 in Warsaw) was a Polish politician and writer. One of many faces of Stalinism in postwar Poland. In the Second Polish Republic he was a member of the Democratic Party and a known publicist. He was also forced to resign his membership in the Polish Academy of Literature in a controversy involving allegations of plagiarism.