Placide Cappeau was the author of "O Holy Night" which was set to music by what French composer and music critic
Placide Cappeau Placide Cappeau (October 25, 1808 – August 8, 1877) was a French poet and the author of the well-known poem, "Minuit, chrétiens" ("O Holy Night") (1847), which was set to music by Adolphe Adam.
Joseph d'Ortigue Joseph Louis d'Ortigue (22 May 1802 – 20 November 1866) was a French musicologist and critic. A specialist in liturgical music and a conservative Catholic of ultramontane and royalist leanings, he was a close friend of both Berlioz and Liszt. His most influential work was "Dictionnaire liturgique, historique, et theorique de plain-chant et le musique d'église", but he was also wrote for many of the most prominent periodicals of the day, including "Journal des débats" and "Le Ménestrel" where he was the editor-in-chief from 1863 until his sudden death at the age of 64.