Sung by the St. Ann Choir yesterday at the noon Mass at St. Thomas Aquinas church in Palo Alto, CA:
Josquin des Prez, De Profundis
William Byrd, Siderum Rector
At least those were the pieces corresponding to the numbers on the old hymn board; sometimes, I think, there are last-minute changes, so this might not be correct. You can read the Latin and English texts by going here, then clicking on the "Motet texts and translations" link in the sidebar.
Terrific homily by Fr. Nahoe, too.
But actually the most interesting thing was a conversation I had with a couple of choir members afterwards. More about that next time, when I'm not in a hurry.