Pope Clement XI firmly held to the opinion that [ apart from the Victory of Lepanto ] other famous victories must be attributed to the intercession of the Blessed Virgin. In 1716, Charles VI, Emperor Elect of the Romans, won a tremendous triumph in the kingdom of Hungary over an overwhelming army of Turks, on the very day on which the feast of the dedication of the basilica of Our Lady of Snows was being celebrated. Indeed almost at the very moment of battle, the confraternity of the most holy Rosary was offering up public and solemn prayer in the Eternal City.
PUBLIC AND SOLEMN PRAYER IN THE ETERNAL CITY
An immense number of people took part in this demonstration. They poured forth with great devotion fervent prayers to God for the overthrow of the Turks. They implored the powerful intercession of the Virgin Mother of God for the help of Christians. In view of this victory, and also of the raising of the siege of the island of Corcyra which followed almost immediately, Clement made this decree. That the memory of these extraordinary favours may be perpetuated forever, that the faithful might be thankful forever, Clement extended the observance of the feast of the most holy Rosary to the universal Church. He ordered that it be continued to be celebrated under the rite of a double major.
HE BESOUGHT THE FAITHFUL ALL OVER THE WORLD TO RECITE THE ROSARY FREQUENTLY
Benedict XIII decreed that all these things be written into the Roman Breviary. When the Church was experiencing one of the most turbulent periods in her history, when for a long time a veritable fury of hard pressing evils was raging, Leo XIII, in a series of Encyclical letters earnestly besought the faithful all over the world to recite the Rosary frequently, especially in the month of October. He raised the rank of the rite of the feast and added to the Litany of Loreto the invocation, “Queen of the most holy Rosary.” He granted as well a special office to be recited on the solemn feast by the Universal Church. Let us, therefore, ever honour the most holy Mother of God by the devotion very dear to her. May she who so many times has answered the prayers of Christ’s faithful in the recitation of the Rosary, who brought their earthly enemies to destruction and defeat, grant victory over the powers of hell to us also.
– From: An Approved English Translation of the Breviarium Romanum, Burns & Oates, London, 1964