Marie JaŽll (1846 - 1925)
Marie (Trautmann) JaŽll (17 August 1846 Ė 4 February 1925) was a French pianist, composer, and pedagogue. Marie JaŽll composed pieces for piano, concertos, quartets, and others, She dedicated her cello concerto to Jules Delsart. and was the first pianist to perform all the piano sonatas of Beethoven in Paris. She did scientific studies of hand techniques in piano playing and attempted to replace traditional drilling with systematic piano methods. Her students included Albert Schweitzer, who studied with her while also studying organ with Charles-Marie Widor in 1898-99. She died in Paris.