Legend states the St. Gregory the Great (d. 604) listened to the very first three traces chanted by angels on a certain Easter early morning in Rome while he walked barefoot in an incredible religious procession and the saint thereupon added the fourth line: “Ora Professional nobis Deum. Alleluia.” This https://vita-pro-nobis65319.qodsblog.com/31187195/an-unbiased-view-of-vita-pro-nobis