Legend claims the St. Gregory The nice (d. 604) listened to the first 3 lines chanted by angels on a particular Easter early morning in Rome although he walked barefoot in a great spiritual procession and which the saint thereupon additional the fourth line: “Ora Professional nobis Deum. Alleluia.” Almighty, https://erickdkotx.thekatyblog.com/30230433/vita-pro-nobis-an-overview