This is a very beautiful, if eclectic recording of Gregorian Chant, Renaissance Polyphony and some miscellaneous "popular" tunes from numerous European countries (ranging from the 11th to the 17th century). Composers include Hildegard of Bingen, William Byrd, Giovanni da Palestrina and Josquin des Prez. An enclosed booklet gives brief biographies of these and other major composers of the time. I think this is a nice place to start for those unfamiliar with early music. Everyone at our house enjoyed the recording very much.

You can listen to samples at the Naxos website.