The tune NICAEA is named after the Council of Nicaea (A.D. 325) at which church leaders began to formulate the doctrine of the Trinity to oppose the heresies of Arius. The melody was composed by John B. Dykes for Reginald Heber’s text “Holy, Holy, Holy!” The two were first published together in Hymns Ancient and Modern (1861), and have been virtually inseparable ever since.

See a list of other hymn tunes here.

Videos:
Christoph Bull – Hymn Improvisation on ‘Holy, Holy, Holy’ – First United Methodist Church in Round Rock, Texas
Patrick A. Scott – Improvisations on Nicaea – University Christian Church, Austin, Texas

Hautbois8 – Improvisation on ‘Holy, Holy, Holy’ – St. Laurens, Rotterdam