Deck the Halls
Deck the halls (with boughs of holly). It’s a fun-to-sing Christmas song (with its fa-la-la refrain) and perhaps one of the most widely recognized and most-often caroled.
First published in 1881, the song is generally believed to be American in origin, although the author remains unknown. The music, however, (or should I say the tune) dates back to 16th Century Wales and a song titled Nos Galan, which means New Year’s Eve. Some people associate the music for Nos Galan with a duet for violin and piano by Mozart, and / or a piece written for voice and piano with violin and cello composed by Haydn.
Interestingly, an early calendar in the Church of Rome described Christmas Eve as templa exornantur; churches are decked.