Placide Cappeau was the author of "O Holy Night" which was set to music by what French composer and music critic
Adolphe Adam Adolphe Charles Adam (] ; 24 July 1803 – 3 May 1856) was a French composer and music critic. A prolific composer of operas and ballets, he is best known today for his ballets "Giselle" (1841) and "Le corsaire" (1856, his last work), his operas "Le postillon de Lonjumeau" (1836), "Le toréador" (1849) and "Si j'étais roi" (1852)
List of Magnificat composers The Magnificat, in Latin also "canticum Beat(issim)ae Virginis Mariae" (the song of the (most) Blessed Virgin Mary), is a common part of Christian worship, for instance traditionally included in vespers, evensong or matins. As such it is often sung and was set to music by various composers.