A film about her has been nominated for best short documentary at next month's Academy Awards.
Herz-Sommer's devotion to the piano and to her son sustained her through two years in a Nazi prison camp. She died in a hospital Sunday morning after being admitted Friday, daughter-in-law Genevieve Sommer said.
An accomplished pianist, Herz-Sommer, her husband and her son were sent from Prague in 1943 to a concentration camp in the Czech city of Terezin - Theresienstadt in German - where inmates were allowed to stage concerts in which she frequently starred.