St. Pope Pius V was a Dominican. When the muslims were decimating the Catholics and the protestants revolting everywhere, he remembered his founder St. Dominic. When St. Dominic was discouraged with the conversion of the Albigensians, Our Lady appeared to him and explained that praying the Our Father and the Angelic Salutation “Hail Mary”, he would have success.
So St. Dominic began praying the Holy Rosary as Our Lady taught him while meditating on the Joyful, Sorrowful and Glorious events of Jesus’ life. He then had great success in his preaching and converting of the heretics and sinners.
For this reason, St. Pope Pius V asked all of Europe to pray the Holy Rosary for the success of the battle of Lepanto against the Muslim fleet. It is said that Our Lady appeared and frightened the muslims.
When St. Pope Pius V was in a meeting he was given a supernatural vision that the Battle had been won by Don Juan of Austria. He immediately turned to God and Our Lady in gratitude. A week later the news arrived that indeed the vision was correct.
The Battle of Lepanto took place on Sunday October 7, 1571. For this reason, October 7 is the feast of the Holy Rosary. At first Our Lady was called Our Lady of Victory because of the victory over the muslims. But latter called Our Lady Help of Christians, and then Our Lady of the Holy Rosary. This is the same Our Lady that is in the town church at Fatima Portugal. When Our Lady appeared to the children of Fatima, that is why she asked them to pray the Holy Rosary.
St. Louis Marie De Montefort also knew of the battle of Lepanto and that also encouraged him to promote the recitation of the Holy Rosary.
The original author of this blog passed away in July of 2016. RIP Father Carota.