French composer Marcel Dupré (1886-1971).
As a composer, Dupré produced a wide-ranging oeuvre of 65 opus numbers, and also taught two generations of well-known organists such as Jehan Alain and Marie-Claire Alain, Pierre Cochereau, Jeanne Demessieux, Rolande Falcinelli, Jean Guillou, Jean Langlais, and Olivier Messiaen, to name only a few. Aside from a few fine works for aspiring organists (such as the 79 Chorales op. 28) most of Dupre's music for the organ ranges from moderately to extremely difficult, and makes almost impossible technical demands on the performer.