"O Holy Night" (original title: Cantique de Noël) is a #sacredSong about the night of the birth of Jesus Christ, described in the first verse as "the dear Saviour", and frequently performed as a #ChristmasCarol. Based on the French-language poem Minuit, chrétiens, written in 1847 by poet #PlacideCappeau, it was set to music by composer #AdolpheAdam. The English version, with small changes to the initial melody, is by #JohnSullivanDwight.
https://www.youtube.com/watch?v=ttcYcZ-fBpQ
Johnny Mathis - "O Holy Night"

YouTube

How a forgotten verse of 'O Holy Night' became an anti-slavery anthem in 1855

https://fed.brid.gy/r/https://www.upworthy.com/anti-slavery-christmas-carols