Jean Victor Arthur Guillou (born April 18, 1930) is a French composer, organist, pianist, and pedagogue. 　　Guillou was born in Angers. Following his first studies in piano and organ, he became organist at the church St. Serge in Angers at the age of 12. He studied then 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. In 1958 he moved to Berlin, where he lived for the following five years, during which he composed and premiered his first works. In 1963 he returned to Paris, having been appointed Titular Organist at Saint Eustache church in succession to André Marchal. Appointed Organiste Titulaire Emerite at St. Eustache in September 2014, Guillou completed 52 years as organist of that church in March 2015, when he was succeeded by two co-titulaires.