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.
Arthur Rubinstein Arthur Rubinstein (Polish: "Artur Rubinstein" ; January 28, 1887December 20, 1982) was a Polish American classical pianist. He received international acclaim for his performances of the music written by a variety of composers and many regard him as the greatest Chopin interpreter of his time. He was described by "The New York Times" as one of the greatest pianists of the twentieth century. He played in public for eight decades.