Jean Guillou was a French composer, organist, pianist, and pedagogue.
He studied at the Paris Conservatoire under Marcel Dupré, Maurice Duruflé and Olivier Messiaen.
In 1955, he accepted a position as professor of organ and composition at the Institute of Sacred Music in Lisbon and wrote his first compositions.
After a few years in Berlin, he returned to Paris in 1963, having been appointed Titular Organist at Saint-Eustache, where he would serve until March 2015.

Guillou’s engagement in organ building led to collaborations with several organ builders and the construction of new instruments, including in the Tonhalle of Zurich and in the Auditorio de Tenerife. He composed over 90 works, for organ, chamber and orchestral music, and wrote several books: L’Orgue – Souvenir et Avenir (1978), La Musique et le Geste (2012), and Le Visiteur, Poèmes (2014).

See also https://hermanvanvliet.com/dossiers/jeanguillou/