Here is a spiritual reflection with some excerpts from the Encyclical of Pope Leo XIII “Supremi Apostolatus Officio” on devotion of the Rosary:
"It has always been the habit of Catholics in danger and in troublous times to fly for refuge to Mary, and to seek for peace in her maternal goodness; showing that the Catholic Church has always, and with justice, put all her hope and trust in the Mother of God. And truly the Immaculate Virgin, chosen to be the Mother of God and thereby associated with Him in the work of man's salvation, has a favour and power with her Son greater than any human or angelic creature has ever obtained, or ever can gain. And, as it is her greatest pleasure to grant her help and comfort to those who seek her, it cannot be doubted that she would deign, and even be anxious, to receive the aspirations of the universal Church. […]
Our need of divine help is as great today as when the great Dominic introduced the use of the Rosary of Mary as a balm for the wounds of his contemporaries.
That great saint indeed, divinely enlightened, perceived that no remedy would be more adapted to the evils of his time than that men should return to Christ, who "is the way, the truth, and the life," by frequent meditation on the salvation obtained for Us by Him, and should seek the intercession with God of that Virgin... He therefore so composed the Rosary as to recall the mysteries of our salvation in succession, and the subject of meditation is mingled and, as it were, interlaced with the Angelic salutation and with the prayer addressed to God, the Father of Our Lord Jesus Christ. We, who seek a remedy for similar evils, do not doubt therefore that the prayer introduced by that most blessed man with so much advantage to the Catholic world, will have the greatest effect in removing the calamities of our times also.
Not only do We earnestly exhort all faithfuls to give themselves to the recital of the pious devotion of the Rosary publicly, or privately in their own house and family, and that unceasingly, but we also desire that the whole of the month of October in this year should be consecrated to the Holy Queen of the Rosary."
“The Virgin With Angels” by William Adolphe Bouguereau, 1900.