What Polish pianist and composer has his heart preserved at National Shrine of Our Lady of Czestochowa?
National Shrine of Our Lady of Czestochowa:  The heart of Poland's second prime minister, Ignacy Jan Paderewski, is also preserved there. 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.
Ignacy Jan Paderewski