Read pp. 650-1 in chap. 19, and then give this a listen. This was composed by Thomas Tallis in the mid to late 1500s AD. This is an example of a verse anthem written for the Anglican Communion Service.
Missa Papae Marcelli, Credo (Palestrina) (chap. 20, pp. 665-667)
Read pp. 665-7 in chap. 20 carefully, then give this a listen. Missa Papae Marcelli means "Mass for Pope Marcellus" and was composed by Palestrina in 1567. The YouTube selection above shows a setting in Rome’s St. Peters Basilicas. Palestrina composed many works for Catholic masses; this polyphonic mass example fits very well the Counter-Reformation mandates of the Council of Trent. The Credo (=creed) is one section of the mass, and the words are based on the ancient Nicene Creed, a profession of faith.
Read pp. 665-667 in chap. 20 carefully, then give this a listen. Super Flumina Babylonis means "By the Rivers of Babylon", derived from Psalm 137 (=Psalm 136 in some versions of the Bible). This polyphonic motet was (and is) sung during Catholic worship. Palestrina composed it in 1581.