what was the first ever christmas song

The first ever Christmas song was likely "The Coventry Carol," a traditional English Christmas carol that dates back to the 1500s. It's a somber and haunting melody, sung by a chorus of women, that tells the story of the Massacre of the Innocents, the slaughter of the innocents by Herod the Great in the Bible. It's believed to have been sung during a play or pageant, and it's one of the oldest known Christmas carols.