Joan (Juan) Cererols (09/09/1618 - 27/08/1676), a Spanish composer, from Martorell. He was admitted as novice in the Montserrat Monastery at the age of 18, and he remained there until his death in 1676. Cererols was disciple of Marques and received the appointment of Chapel Master of the abbey. Due to this fact, he composed numerous works of religious music, especially poliphony. The fame of his music spread beyond the walls of the celebrated monastery. This is the case of the Battle Mass, for three choirs, or the Requiem Mass for 7 voices, although his sacred catalogue is very complete. Besides, he is the first known composer that uses, in his "Ay qué dolor," the theme that Bach later employs in the initial chorus of his Saint Matthew Passion.