In paradisum (English: "Into paradise") is an antiphon from the traditional Latin liturgy of the Western Church Requiem Mass. It is sung by the choir as the body is being taken out of the church. The text of the In paradisum -- with or without the Gregorian melody itself -- is sometimes included in musical settings of the Requiem Mass, such as those by Gabriel Fauré and Maurice Duruflé.
In the Masses for the dead, this antiphon is sung in procession on the way from the final blessing of the corpse in church to the graveyard where burial takes place. The Gregorian melody for In paradisum is in the Mixolydian mode. The special nature of this mode -- with its lowered seventh degree, which makes it different from the modern major mode -- is heard twice in this melody at cadences on the words Chorus Angelorum and quondam paupere. The melodic highpoint in this setting comes on the name of Lazarus, the poor beggar in Luke's Gospel.
A couple of adaptations of In paradisum have been written in English. Bob Dufford wrote a version called "Songs of the Angels". James Quinn also wrote a version titled "May Flights of Angels Lead You On Your Way", accompanied by Unde et Memores. Either of these, or the traditional Latin version, are sung at contemporary Catholic funeral masses.
In Paradisum served as the inspiration for popular Gospel-turned-jazz piece "When the Saints Go Marching In", which share the same first four notes, similar textual meaning, and use during the funeral procession of the body from the church to the cemetery.