Dies irre, dies ilia; That Day of Wrath, That Dreadful Day
Sequence in Requiem Masses.
It was written in the 13th century by Thomas of Celauo.
In 1895 there existed 234 recorded English translations; the one with the English title given above was done in part by W. Wingfield, and in part by J. Aylward.
There is no record of the authorship or origin of the old ecclesiastical melody; it was probably either written by Thomas of Celano himself, or else adapted to his hymn as soon as the latter was finished.
Among the notable modern musicians to set it to music were: Colonna, Bassaui, Mozart (probably), Cherubini, Berlioz, Verdi, Bruneau, and Gbunod.
New Catholic Dictionary