Gregorian Chant, the liturgical music first popularized throughout the Universal Church in the 5th Century remains still popular in Catholic and even secular culture today. On Register radio we find out why chant has endured the test of time with music scholar and author Dr. James Jordan. But first we turn to another timeless treasure of the Catholicism the Doctors of the Church as we talk about an EWTN series produced by our very own Dr. Matthew Bunson.