Six studies, Op. 5 is a set of studies for Organ by Jeanne Demessieux, with a preface by Marcel Dupré. For upper-intermediate and above players, these studies were conceived to help the progression of the player, to enable them to acquire the necessary skills and to maintain their high level.

Each study focuses on a special aspect and uses both hands and feet :
1. E minor: Alternating toes-tend
2. B major: Alternating thirds
3. F sharp major: Alternating sixths
4. F major: Alternating chords
5. E major: Repeated notes
6. C sharp minor: octaves

Jeanne Demessieux (1921-1968) was a French organist, pianist, composer and pedagogue. She studied Organ with Marcel Dupré and was the main organist at La Madeleine in Paris.