Dupré composed a great deal of organ music. As a young child he got to know Aristide Cavaillé-Coll, the most famous organ builder in France. Cavaillé-Coll had built the organ that Dupré’s father played, so he was used to the sound of modern French organs. Most of Dupré's music for the organ is very difficult to play. It includes the "Three Preludes and Fugues", Op. 7 (1914). Even Widor thought that the Prelude of the third piece was simply impossible to perform. However, Dupré could play it, and many organists after him learned to play it, too. Other notable works of Dupré's include the "Symphonie-Passion", the "Esquisses" and "Évocation", and the "Cortège et Litanie". 