Conditor alme siderum,
aeterna lux credentium,
Christe, redemptor omnium,
exaudi preces supplicum.
Creator of the stars of night,
Thy people’s everlasting light,
Jesu, Redeemer, save us all,
and hear Thy servants when they call.
Conditor alme siderum is an anonymous text from the 7th century used at Vespers during Advent. It was translated from Latin to English by John M. Neale in the Hymnal Noted, published in 1852. The hymn follows the Long Meter poetic rhythm and is in Mode IV.
See a list of other popular chant themes here.