Songs
Te Deum Laudamus — Gregorian Chant
The Te Deum laudamus is the Church's great hymn of thanksgiving, prayed on solemnities, at thanksgiving services, and in the Liturgy of the Hours. Traditional Latin text; Gregorian melody (mode VIII) per Liber Usualis and CPDL.
Lyrics
TEXT (Latin — opening) Te Deum laudamus: te Dominum confitemur. Te aeternum Patrem omnis terra veneratur. Tibi omnes angeli, tibi caeli et universae potestates, tibi cherubim et seraphim incessabili voce proclamant: Sanctus, Sanctus, Sanctus Dominus Deus Sabaoth. Pleni sunt caeli et terra maiestatis gloriae tuae. (full text in the Liturgy of the Hours — Office of Readings)
Chords
Chant
Monodic Gregorian chant (mode VIII).
Source: Liber Usualis / Choral Public Domain Library (public domain).
Reference: cpdl.org/wiki/index.php/Te_Deum_laudamus_(Gregorian_chant)
When to pray
Sing on solemnities, thanksgiving celebrations, Easter vigils, and at festive conclusions of the Office.