Legend states the St. Gregory The nice (d. 604) heard the main 3 strains chanted by angels on a certain Easter early morning in Rome whilst he walked barefoot in an excellent spiritual procession and the saint thereupon added the fourth line: “Ora Professional nobis Deum. Alleluia.” Almighty, eternal God, https://nervocure19763.xzblogs.com/72297030/everything-about-vita-pro-nobis