L'ascension ("The Ascension") is a piece for orchestra, composed by Olivier Messiaen in 1932-33. Messiaen described it as "4 meditations for orchestra".
The orchestral piece is in four brief sections:
A complete performance takes around 27 minutes.
In 1933-34, Messiaen made a version for solo organ. The first, second and fourth movements are arrangements of the orchestral pieces, but Messiaen composed a new third movement, Transports de joie d'une âme devant la gloire du Christ qui est la sienne ("Ecstasies of a soul before the glory of Christ, which is its own glory"), usually just known as Transports de joie. ().