There are several versions of a story of how Leo came to compose the Prayer to Saint Michael. Various dates are given. A common account says that on the morning of 13 October 1884, Leo XIII celebrated Mass but as he finished, he turned to step down the stairs and allegedly collapsed, falling into what was originally thought to be a coma, but was rather a mystical ecstasy. As the priests and cardinals rushed to his side, Leo XIII rose and visibly shaken, brushed off his aides and rushed back towards his apartment where he immediately wrote the Prayer to Saint Michael the Archangel. Leo XIII reportedly saw a vision of demons being released from Hell, however, just as the vision ended, he saw Saint Michael charge in and drive them all back into Hell. Leo XIII mandated that the prayer be said after every Mass from that point forth.
