A duration row or duration series is an ordering of a set of durations, in analogy with the tone row or twelve-tone set. Olivier Messiaen's "Mode de valeurs et d'intensités" is often cited as the first serial piece, but, as well as being predated by Babbitt, both lacks order and views each note as a unit, rather than composing each parameter separately. Messiaen had, however, previously used this chromatic duration series as an ordered set in the opening episode of "Turangalîla 2", a movement from the Turangalîla-Symphonie (1946–48).