Tu Trinitatis Unitas

This hymn is the hymn for Matins on Fridays throughout the year in the Extraordinary Form. In the Ordinary Form, this hymn is used for the hymn for Office of Readings on Fridays of Weeks I & III of Ordinary Time. It is also used for Lauds on Trinity Sunday.

Tu, Trinitatis Unitas,
Orbem potenter qui regis,
Attende laudum cantica
Quæ excubantes psallimus.

Nam lectulo consurgimus
Noctis quieto tempore,
Ut flagitemus vulnerum
A te medelam omnium.

Quo fraude quicquid daemonum
In noctibus deliquimus,
Abstergat illud cælitus
Tuæ potestas gloriæ.

*Ne corpus adsit sordidum,
Nec torpor instet cordium,
Ne criminis contagio
Tepescat ardor spiritus.

Te corde fido, quæsumus,
Reple tuo nos lumine,
Per quod dierum circulis
Nullis ruamus actibus.

Præsta, Pater piissime,
Patrique compar Unice,
Cum Spiritu Paraclito,
Regnans per omne sæculum. Amen.

This hymn takes the following form on Trinity Sunday:

Tu, Trinitatis Unitas,
Orbem potenter qui regis,
Attende laudum cantica,
Quæ excubantes psallimus.

Ortus refulget lucifer,
Sparsamque lucem nuntiat:
Cadit caligo noctium:
Lux sancta nos illuminet.

Deo Patri sit gloria,
Eiusque soli Filio,
Cum Spiritu paraclito,
Et nunc et in perpetuum. Amen.

Words: ascr. Pope St. Gregory the Great (I), 6th C.
Tune: “Tu Trinitatis Unitas” Gregorian Chant, Mode IV, traditional.
Meter: 88.88

*This verse has been omitted in the Liber Hymnarius for the Ordinary Form.

The hymn takes the following form in Pope Urban VIII’s 1632 reform of the Breviary:

Tu, Trinitatis Unitas,
Orbem potenter quæ regis,
Attende laudis canticum
Quod excubantes psallimus.

Nam lectulo consurgimus
Noctis quieto tempore,
Ut flagitemus omnium
A te medelam vulnerum.

Quo fraude quidquid daemonum
In noctibus deliquimus,
Abstergat illud cælitus
Tuæ potestas gloriæ.

Ne corpus astet sordidum,
Nec torpor instet cordium,
Ne criminis contagio
Tepescat ardor spiritus.

Ob hoc, Redemptor, quæsumus,
Reple tuo nos lumine,
Per quod dierum circulis
Nullis ruamus actibus.

Præsta, Pater piissime,
Patrique compar Unice,
Cum Spiritu Paraclito,
Regnans per omne sæculum. Amen.

This hymn takes the following form on Trinity Sunday:

Tu, Trinitatis Unitas,
Orbem potenter quæ regis,
Attende laudis canticum
Quod excubantes psallimus.

Ortus refulget Lucifer,
Sparsamque lucem nunciat:
Cadunt tenebræ noctium:
Lux sancta nos illuminet.

Deo Patri sit gloria,
Eiusque soli Filio,
Cum Spiritu Paraclito,
Nunc et per omne sæculum. Amen.

This hymn has been translated into English as “O Thou! Who Dost All Nature Sway.”

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About Noah

musings of a young Catholic aspiring to be faithful to his Lord and God Jesus Christ through His Holy Catholic Church
This entry was posted in Ancient & Mediaeval Hymns, Days of the Week, Friday (Feria VI), Hymns By The Greats, Latin Hymns, Major Feasts, Matins/Office of Readings, Morning Prayer/Lauds, Non-English Hymns, Ordinary Time, Pope St. Gregory the Great, Roman Breviary, Saints of the Church (Canonized or Beatified), The Church Year, The Holy Trinity, The Liturgy of Hours/Hours of the Day, Trinity Sunday (Sunday after Pentecost), Weeks After Epiphany (EF), Weeks after Pentecost (EF). Bookmark the permalink.

One Response to Tu Trinitatis Unitas

  1. Pingback: O Thou! Who Dost All Nature Sway | Saint Augustine's Lyre

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