When, in the thirteenth century, many Christians were being perverted by the Albigensian heretics, Our Lady, appeared to St. Dominic and admonished him to preach every where the reciting of the Holy Rosary, as the means for averting danger to souls. Devotion to the Holy Rosary is widespread today. Catholics pray the Holy Rosary, daily.
God's help was implored in the age of the capture of Constantinople by the Turks (1452) and the danger of them overrunning the West was very real. There were two decisive Christian victories of Lepanto and Belgrade. The prayers were answered and a Feast of the Rosary was instituted to the Universal Church.