Legend states the St. Gregory The nice (d. 604) listened to the very first a few lines chanted by angels on a specific Easter morning in Rome though he walked barefoot in a fantastic spiritual procession and which the saint thereupon additional the fourth line: “Ora pro nobis Deum. Alleluia.” https://trevorhoswz.articlesblogger.com/53957691/a-review-of-vita-pro-nobis