All hail, adorèd Trinity;
All hail, eternal Unity;
O God the Father, God the Son,
And God the Spirit, ever One.
Three Persons praise we evermore,
One only God our hearts adore:
In thy sure mercy ever kind
May we our strong protection find.
O Trinity! O Unity!
Be present as we worship Thee;
And with the songs that angels sing
Unite the hymns of praise we bring.
anonymous Latin hymn of the 11th century
translated by John David Chambers (1803-93).