“1. ...that mountain of the Glorious Virgin Mary, loving Mother of God. For she by her seed has crushed the head of the twisted serpent, and has alone destroyed all heresies, and by the blessed fruit of her womb has saved a world condemned by the fall of our first parent. From her, without human hand, was that stone cut, which, struck by wood, poured forth the abundantly flowing waters of graces. And so Dominic looked to that simple way of praying and beseeching God, accessible to all and wholly pious, which is called the Rosary, or Psalter of the Blessed Virgin Mary, in which the same most Blessed Virgin is venerated by the angelic greeting repeated one hundred and fifty times, that is, according to the number of the Davidic Psalter, and by the Lord’s Prayer with each decade. Interposed with these prayers are certain meditations showing forth the entire life of Our Lord Jesus Christ, thus completing the method of prayer devised by the by the Fathers of the Holy Roman Church. This same method St. Dominic propagated, and it was, spread by the ??? Friars of Blessed Dominic, namely, of the aforementioned Order, and accepted by not a few of the people. Christ’s faithful, inflamed by these prayers, began immediately to be changed into new men. The darkness of heresy began to be dispelled, and the light of the Catholic Faith to be revealed. Sodalities for this form of prayer began to be instituted in many places by the Friars of the same Order, legitimately deputed to this work by their Superiors, and confreres began to be enrolled together.
2. Following the example of our predecessors, seeing that the Church militant, which God has placed in our hands, in these our times is tossed this way and that by so many heresies, and is grievously troubled troubled and afflicted by so many wars, and by the deprave morals of men, we also raise our eyes, weeping but full of hope, unto that same mountain, whence every aid comes forth, and we encourage and admonish each member of Christ’s faithful to do likewise in the Lord.”  

Pope St. Pius V, Consueverunt Romani, September 17 1569