Missa pro Defunctis: Communio

The Communion song from the Requiem Mass, sung by Giovanni Vianini:

Lux æterna luceat eis, Domine,
cum sanctis tuis in æternum,
quia pius es.
Requiem æternam dona eis, Domine;
et lux perpetua luceat eis ;
cum Sanctis tuis in aeternum,
quia pius es.

May everlasting light shine upon them, O Lord,
with your saints forever,
for you are merciful.
Grant them eternal rest, O Lord,
and may everlasting light shine upon them.
with your saints forever,
for you are merciful.

Here's the chant score:




Again you can clearly hear this Gregorian melody in the Duruflé version of the song:



But actually, I really like John Rutter's version of the Lux Aeterna: