Sunset. Eventide approaches for December 16th, and the liturgical calendar moves into the final octave before Christmas. Beginning with the 17th of December, the liturgical tradition marks each day until Christmas Eve with an ancient and mysterious text, one of the so-called O-Antiphons. The O-Antiphons are among the most magnificent and ancient compositions of the Roman liturgy. Dating back to at least the seventh century, they are antiphons for the Magnificat (the prayer said before and...