Sung by the St. Ann Choir at St. Thomas at noon on Christmas Day:
Chant for the day, Puer natus est
William Byrd, Mass for Three Voices
Of course, the real treat was at the midnight Mass (which for family reasons I was unable to attend) with the Dominus dixit ad me chant and Orlando di Lasso's Missa Sesquialtera.
Once more, many many thanks are due to Prof. William Mahrt for his long sustained effort to keep the tradition of Gregorian chant and Renaissance polyphony alive here for the past forty years.
A good sign, though inconvenient: they're occasionally running out of chant leaflets these days, because attendance at this "Gregorian" Mass is steadily climbing. A nice problem to have!