Which concerto is dedicated to a Polish-American virtuoso pianist born in 1870?
Piano Concerto No. 1 (Glazunov): Alexander Glazunov composed his Piano Concerto No. 1 in F minor, Opus, 92, in 1911, during his tenure as director of the St. Petersburg Conservatory. Piano Concerto No. 1 (Glazunov):  The concerto is dedicated to Leopold Godowsky, whom Glazunov had heard on tour in St. Petersburg in 1905. Leopold Godowsky: Leopold Godowsky (13 February 1870 – 21 November 1938) was a Polish-American virtuoso pianist, composer, and teacher.
Piano Concerto No. 1