"According to tradition, the rosary was given to St. Dominic in an apparition by the Blessed Virgin Mary in the year 1214 in the church of Prouille. This Marian apparition received the title of Our Lady of the Rosary. Alain de la Roche or Saint Alan of the Rock, a learned Dominican priest and theologian, and established the "15 rosary promises" and started many rosary confraternities. However, most scholarly research suggests a more gradual and organic development of the rosary." (wikipedia)
The feast we are to celebrate is related to an annual feast commemorating the victory of Lepanto.
"In 1571 Pope Pius V instituted "Our Lady of Victory" as an annual feast to commemorate the victory of Lepanto. The victory was attributed to the Blessed Virgin Mary as a rosary procession had been offered on that day in St. Peter's Square in Rome for the success of the mission of the Holy League to hold back Muslim forces from overrunning Western Europe. In 1573, Pope Gregory XIII changed the title of this feast-day to "Feast of the Holy Rosary". This feast was extended by Pope Clement XII to the whole of the Latin Rite inserting it into the Roman Catholic calendar of Saints in 1716, and assigning it to the first Sunday in October. Pope Pius X changed the date to 7 October in 1913, as part of his effort to restore celebration of the liturgy of the Sundays. In 1969, Pope Paul VI changed the name of the feast to "Our Lady of the Rosary"."(wikipedia.org)
Our late Holy Father Pope John Paul II wrote an apostolic letter on the Rosary called "Rosarium Virginis Mariae" (Rosary of the Virgin Mary). It is a wonderful document and is very much worth reading. Below is the conclusion of the said apostolic letter. You can read its entirety by clicking the link provided.
ROSARIUM VIRGINIS MARIAE
“Blessed Rosary of Mary, sweet chain linking us to God”
39. What has been said so far makes abundantly clear the richness of this traditional prayer, which has the simplicity of a popular devotion but also the theological depth of a prayer suited to those who feel the need for deeper contemplation.
The Church has always attributed particular efficacy to this prayer, entrusting to the Rosary, to its choral recitation and to its constant practice, the most difficult problems. At times when Christianity itself seemed under threat, its deliverance was attributed to the power of this prayer, and Our Lady of the Rosary was acclaimed as the one whose intercession brought salvation.
Today I willingly entrust to the power of this prayer – as I mentioned at the beginning – the cause of peace in the world and the cause of the family.
40. The grave challenges confronting the world at the start of this new Millennium lead us to think that only an intervention from on high, capable of guiding the hearts of those living in situations of conflict and those governing the destinies of nations, can give reason to hope for a brighter future.
The Rosary is by its nature a prayer for peace, since it consists in the contemplation of Christ, the Prince of Peace, the one who is “our peace” (Eph 2:14). Anyone who assimilates the mystery of Christ – and this is clearly the goal of the Rosary – learns the secret of peace and makes it his life's project. Moreover, by virtue of its meditative character, with the tranquil succession of Hail Marys, the Rosary has a peaceful effect on those who pray it, disposing them to receive and experience in their innermost depths, and to spread around them, that true peace which is the special gift of the Risen Lord (cf. Jn 14:27; 20.21).
The Rosary is also a prayer for peace because of the fruits of charity which it produces. When prayed well in a truly meditative way, the Rosary leads to an encounter with Christ in his mysteries and so cannot fail to draw attention to the face of Christ in others, especially in the most afflicted. How could one possibly contemplate the mystery of the Child of Bethlehem, in the joyful mysteries, without experiencing the desire to welcome, defend and promote life, and to shoulder the burdens of suffering children all over the world? How could one possibly follow in the footsteps of Christ the Revealer, in the mysteries of light, without resolving to bear witness to his “Beatitudes” in daily life? And how could one contemplate Christ carrying the Cross and Christ Crucified, without feeling the need to act as a “Simon of Cyrene” for our brothers and sisters weighed down by grief or crushed by despair? Finally, how could one possibly gaze upon the glory of the Risen Christ or of Mary Queen of Heaven, without yearning to make this world more beautiful, more just, more closely conformed to God's plan?
In a word, by focusing our eyes on Christ, the Rosary also makes us peacemakers in the world. By its nature as an insistent choral petition in harmony with Christ's invitation to “pray ceaselessly” (Lk 18:1), the Rosary allows us to hope that, even today, the difficult “battle” for peace can be won. Far from offering an escape from the problems of the world, the Rosary obliges us to see them with responsible and generous eyes, and obtains for us the strength to face them with the certainty of God's help and the firm intention of bearing witness in every situation to “love, which binds everything together in perfect harmony” (Col 3:14).
The family: parents...
41. As a prayer for peace, the Rosary is also, and always has been, a prayer of and for the family. At one time this prayer was particularly dear to Christian families, and it certainly brought them closer together. It is important not to lose this precious inheritance. We need to return to the practice of family prayer and prayer for families, continuing to use the Rosary.
In my Apostolic Letter Novo Millennio Ineunte I encouraged the celebration of the Liturgy of the Hours by the lay faithful in the ordinary life of parish communities and Christian groups;(39) I now wish to do the same for the Rosary. These two paths of Christian contemplation are not mutually exclusive; they complement one another. I would therefore ask those who devote themselves to the pastoral care of families to recommend heartily the recitation of the Rosary.
The family that prays together stays together. The Holy Rosary, by age-old tradition, has shown itself particularly effective as a prayer which brings the family together. Individual family members, in turning their eyes towards Jesus, also regain the ability to look one another in the eye, to communicate, to show solidarity, to forgive one another and to see their covenant of love renewed in the Spirit of God.
Many of the problems facing contemporary families, especially in economically developed societies, result from their increasing difficulty in communicating. Families seldom manage to come together, and the rare occasions when they do are often taken up with watching television. To return to the recitation of the family Rosary means filling daily life with very different images, images of the mystery of salvation: the image of the Redeemer, the image of his most Blessed Mother. The family that recites the Rosary together reproduces something of the atmosphere of the household of Nazareth: its members place Jesus at the centre, they share his joys and sorrows, they place their needs and their plans in his hands, they draw from him the hope and the strength to go on.
... and children
42. It is also beautiful and fruitful to entrust to this prayer the growth and development of children. Does the Rosary not follow the life of Christ, from his conception to his death, and then to his Resurrection and his glory? Parents are finding it ever more difficult to follow the lives of their children as they grow to maturity. In a society of advanced technology, of mass communications and globalization, everything has become hurried, and the cultural distance between generations is growing ever greater. The most diverse messages and the most unpredictable experiences rapidly make their way into the lives of children and adolescents, and parents can become quite anxious about the dangers their children face. At times parents suffer acute disappointment at the failure of their children to resist the seductions of the drug culture, the lure of an unbridled hedonism, the temptation to violence, and the manifold expressions of meaninglessness and despair.
To pray the Rosary for children, and even more, with children, training them from their earliest years to experience this daily “pause for prayer” with the family, is admittedly not the solution to every problem, but it is a spiritual aid which should not be underestimated. It could be objected that the Rosary seems hardly suited to the taste of children and young people of today. But perhaps the objection is directed to an impoverished method of praying it. Furthermore, without prejudice to the Rosary's basic structure, there is nothing to stop children and young people from praying it – either within the family or in groups – with appropriate symbolic and practical aids to understanding and appreciation. Why not try it? With God's help, a pastoral approach to youth which is positive, impassioned and creative – as shown by the World Youth Days! – is capable of achieving quite remarkable results. If the Rosary is well presented, I am sure that young people will once more surprise adults by the way they make this prayer their own and recite it with the enthusiasm typical of their age group.
The Rosary, a treasure to be rediscovered
43. Dear brothers and sisters! A prayer so easy and yet so rich truly deserves to be rediscovered by the Christian community. Let us do so, especially this year, as a means of confirming the direction outlined in my Apostolic Letter Novo Millennio Ineunte, from which the pastoral plans of so many particular Churches have drawn inspiration as they look to the immediate future.
I turn particularly to you, my dear Brother Bishops, priests and deacons, and to you, pastoral agents in your different ministries: through your own personal experience of the beauty of the Rosary, may you come to promote it with conviction.
I also place my trust in you, theologians: by your sage and rigorous reflection, rooted in the word of God and sensitive to the lived experience of the Christian people, may you help them to discover the Biblical foundations, the spiritual riches and the pastoral value of this traditional prayer.
I count on you, consecrated men and women, called in a particular way to contemplate the face of Christ at the school of Mary.
I look to all of you, brothers and sisters of every state of life, to you, Christian families, to you, the sick and elderly, and to you, young people: confidently take up the Rosary once again. Rediscover the Rosary in the light of Scripture, in harmony with the Liturgy, and in the context of your daily lives.
May this appeal of mine not go unheard! At the start of the twenty-fifth year of my Pontificate, I entrust this Apostolic Letter to the loving hands of the Virgin Mary, prostrating myself in spirit before her image in the splendid Shrine built for her by Blessed Bartolo Longo, the apostle of the Rosary. I willingly make my own the touching words with which he concluded his well-known Supplication to the Queen of the Holy Rosary: “O Blessed Rosary of Mary, sweet chain which unites us to God, bond of love which unites us to the angels, tower of salvation against the assaults of Hell, safe port in our universal shipwreck, we will never abandon you. You will be our comfort in the hour of death: yours our final kiss as life ebbs away. And the last word from our lips will be your sweet name, O Queen of the Rosary of Pompei, O dearest Mother, O Refuge of Sinners, O Sovereign Consoler of the Afflicted. May you be everywhere blessed, today and always, on earth and in heaven”.
From the Vatican, on the 16th day of October in the year 2002, the beginning of the twenty- fifth year of my Pontificate.
JOHN PAUL II