| "Holy, Holy, Holy! Lord God Almighty!" | |
|---|---|
| Hymn | |
 Reginald Heber | |
| Occasion | Trinity |
| Text | by Reginald Heber |
| Based on | |
| Meter | 11.12.12.10 |
| Melody | "Nicaea" by John Bacchus Dykes |
| Composed | 1861 |
"Holy, Holy, Holy! Lord God Almighty!" is a Christian hymn written by the Anglican bishop Reginald Heber (1783–1826).
It is sung to the tune "Nicaea", by John Bacchus Dykes. Written during the author's time as vicar in Hodnet, Shropshire, England, it was first published posthumously. Appearing in the influential Hymns Ancient and Modern, it is one of Heber's most popular compositions, enduring into the 21st century in many Christian traditions.
Intended for use on Trinity Sunday, the text invites worshippers to join in praising the trinitarian deity, paraphrasing Revelation 4:1–11.