These chants may sound both familiar and unfamiliar at first, but they date to a time when the Church Apostolic and Catholic was one, when Rome had not shaken off the Grace off of itself. Originally sung in Greek, the Church of Rome soon adopted Latin, the dominant tongue, as its liturgical language. The listener will easily notice the similarities with the Greek Byzantine chant, but will also discern the typical tune later found, in a rather modified version, in the Gregorian chant. In any event, we are here a universe away from the modern ‘music’ that has perverted the Western liturgical life.