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In page Olga Samaroff:

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She married Stokowski in 1911, and their daughter Sonya was born in 1921. At that time, Samaroff was much more famous than her husband and was able to lobby her contacts to get Stokowski appointed in 1912 to the vacant conductor's post at the Philadelphia Orchestra, thus launching his international career. Samaroff made a number of recordings in the early 1920s for the Victor Talking Machine Company. She was the second pianist in history, after Hans von Bülow, to perform all 32 Beethoven piano sonatas in public, preceding Artur Schnabel (who did the series in 1927) by several years.[1] German pianist Walter Gieseking also performed the complete sonatas in public by age 15 (c. 1910).[citation needed]