About the song
The text was written by Phillips Brooks (1835–1893), an Episcopal priest, then rector of Church of the Holy Trinity, Philadelphia and later of Trinity Church, Boston. He was inspired by visiting the village of Bethlehem in the Sanjak of Jerusalem in 1865. Three years later, he wrote the poem for his church, and his organist Lewis Redner (1831-1908) added the music.
You can know more about Volt and his music on his website.