Legend states the St. Gregory The good (d. 604) heard the 1st a few traces chanted by angels on a certain Easter morning in Rome though he walked barefoot in a terrific religious procession and the saint thereupon added the fourth line: “Ora Professional nobis Deum. Alleluia.” This Marian hymn https://vita-pro-nobis32086.getblogs.net/63668193/the-5-second-trick-for-vita-pro-nobis