Origins and Attribution
The Te Deum is one of the oldest and most influential texts in Western Christian worship, a hymn of praise to the Trinity that has been used in the daily office of the Western church since at least the fifth century. Its traditional attribution to Nicetas of Remesiana (c. 335-414), bishop of a town in modern Serbia, represents the current scholarly consensus, though the hymn was long attributed to Ambrose and Augustine on the basis of a legendary account of their improvising it together at Augustine's baptism.
The text was incorporated into the Western monastic office by Benedict of Nursia in his Rule (c. 530), where it was prescribed for use at Matins on Sundays and feast days. Through Benedict's Rule and the subsequent spread of Benedictine monasticism, the Te Deum became universal in Western Christian worship. By the medieval period it was sung at coronations, victories, and moments of national thanksgiving - the grand, public face of the church's praise - and it has continued in this role through the Reformation, the Counter-Reformation, and into the modern period.
Biblical Sources
The Te Deum is a tissue of biblical references, drawing primarily on the book of Psalms, Isaiah, and the book of Revelation. Its opening - 'We praise thee, O God; we acknowledge thee to be the Lord' - is a declaration of the Trinitarian faith, moving immediately to a description of the heavenly worship of Isaiah 6:3: 'Holy, holy, holy, Lord God of Hosts: heaven and earth are full of the majesty of thy glory.' The Sanctus of Isaiah 6 - the seraphim's threefold acclamation before the enthroned God - is transposed into the opening of the Te Deum as the pattern of all Christian praise: it begins where the angels begin, with the triple Sanctus before the divine throne.
Revelation 4:8 provides a parallel text: 'Each of the four living creatures had six wings and was covered with eyes all around, even under its wings. Day and night they never stop saying: 'Holy, holy, holy is the Lord God Almighty, who was, and is, and is to come.'' The Te Deum's structure mirrors the Revelation vision: the heavenly worship of the cherubim and seraphim and apostles and martyrs, all united in praise of the one God, with the believing church on earth joining its voice to the eternal chorus.
Trinitarian Theology
The Te Deum is one of the earliest and most comprehensive musical expressions of Trinitarian theology, moving through adoration of the Father ('We praise thee, O God'), the Son ('Thou art the King of Glory, O Christ'), and the Spirit (implicitly through the work of sanctification and redemption described in the hymn's later sections). The hymn's Trinitarian structure reflects the theological battles of the fourth century in which Nicetas participated: the Council of Nicaea (325) and its affirmation of the full divinity of the Son were still living controversies, and the Te Deum's Christology is explicitly Nicene.
The central Christological section - 'When thou tookest upon thee to deliver man, thou didst not abhor the Virgin's womb... Thou sittest at the right hand of God, in the glory of the Father' - traces the Incarnation, the Passion, the Ascension, and the Session (the enthroned Christ at God's right hand from Psalm 110:1) in a condensed narrative that is itself a creed set to poetry.
Musical Settings Across Centuries
The Te Deum has attracted more major composers than almost any other liturgical text. The list of significant settings includes Henry Purcell (1694, for the St. Cecilia's Day celebrations), George Frideric Handel (the 'Dettingen Te Deum' of 1743, composed to celebrate the British victory at the Battle of Dettingen), Hector Berlioz (his Te Deum of 1849 for soloists, double chorus, children's chorus, and orchestra, one of the largest-scale sacred works of the nineteenth century), Anton Bruckner (1884), and Giuseppe Verdi (his Te Deum for double chorus and orchestra of 1898, one of his late sacred works).
In the twentieth century, Benjamin Britten composed a Te Deum in 1935 for choir and organ, and John Adams composed an orchestral piece ('Short Ride in a Fast Machine') that has been used in civic contexts that once would have called for a Te Deum. The tradition of setting the Te Deum for major public occasions has continued unbroken from the fourth century to the present, making it the longest-running liturgical commission in Western music history.
The Psalm Foundation
Psalm 145:1 - 'I will exalt you, my God the King; I will praise your name for ever and ever' - represents the broader Psalter tradition that underlies the Te Deum's doxological impulse. The Psalms of Ascent (120-134) and the great Hallel psalms (146-150) provided the pattern of sustained praise with which the Te Deum aligns itself: praise that covers all of creation, all of time, and all of the divine attributes.
Thanksgivings and State Occasions
The Te Deum's use at moments of national thanksgiving gives it a unique place in the intersection of religion and politics. When Elizabeth I attended a Te Deum after the defeat of the Spanish Armada in 1588, when Churchill attended a thanksgiving service at St. Paul's Cathedral in 1945, and when democracies elect new governments and mark significant anniversaries, the Te Deum has often been the musical frame. Its combination of ancient authority, Trinitarian theology, and musical grandeur makes it the appropriate vehicle for the moment when a community wishes to attribute its achievements to a power greater than itself.