From the 2011 Royal School of Church Music King's College Course: The ancient hymn "O Trinity of Blessed Light", set to the tune of Patrick Doyle's "Hogwarts' Hymn" from Harry Potter and the Goblet of Fire.
O Trinity of blessèd light,
O Unity of princely might,
The fiery sun now goes his way;
Shed Thou within our hearts a ray.
To Thee our morning song of praise,
To Thee our evening prayer we raise;
O grant us with Thy saints on high
To praise Thee through eternity.
All laud to God the Father be,
All praise, eternal Son, to Thee,
All glory, as is ever meet,
To God the holy Paraclete.
Words: Attributed to Ambrose of Milan, 6th Century (O Lux beata Trinitas); translated from Latin to English by John M. Neale, 1852.
Tune: “Hogwarts’ Hymn” - Patrick Doyle