"O Holy Night" (original title: Cantique de Noël) is a sacred song about the night of the birth of Jesus Christ, described in the first verse as "the dear Saviour", and frequently performed as a Christmas carol. Based on the French-language poem Minuit, chrétiens, written in 1843 by poet Placide Cappeau, it was set to music by composer Adolphe Adam. The English version, with small changes to the initial melody, is by John Sullivan Dwight. In modern times, the song has been covered multiple times, including by Celine Dion, Mariah Carey and Lauren Daigle. Origin and composition.
https://en.wikipedia.org/wiki/O_Holy_Night