Quo Primum, Papal Bull of Pope St. Pius V, Regarding Its Liceity for All Ages.

Quo Primum His Holiness Pope St. Pius VBull Promulgated on July 14, 1570 Quo Primum is an Apostolic Bull, a decree, issued by Pope St. Pius V, which establishes the right of any priest to say this Mass in the future, “in perpetuity,” and which threatens anyone who dare contravene this order with “the wrath …