The Rosary (pronunciation: /ˈrəʊz(ə)ri/, Latin: , in the sense of "crown of roses" or "garland of roses"), usually in the form of the Dominican Rosary, is a form of prayer used especially in the Catholic Church named for the string of knots or beads used to count the component prayers. When used of the form of prayer, the word is usually capitalized ("the Rosary"), as is customary for other names of prayers, such as "the Lord's Prayer", "the Hail Mary", "the Magnificat". When referring to the beads, it is normally written with a lower-case initial ("a rosary").
The prayers that essentially compose the Rosary are arranged in sets of ten Hail Marys with each set preceded by one Lord's Prayer and followed by one Glory Be, with perhaps the "Oh My Jesus" added, based on the apparitions at Fátima in 1917. During recitation of each set, known as a decade, thought is given to one of the Mysteries of the Rosary, which recall events in the lives of Jesus and Mary. The Glorious mysteries are said on Sunday and Wednesday, the Joyful on Monday and Saturday, the Sorrowful on Tuesday and Friday, and the Luminous Mysteries are said on Thursday. Normally, five decades are recited in a session. Various prayers are sometimes added after each decade (for example, the Fátima Prayer), at the beginning (in particular, the Apostles' Creed), and at the end (in particular, the Hail, Holy Queen). The rosary as a material object is an aid towards saying these prayers in the proper sequence.
The Rosary is a devotion for the meditation of the mysteries of the lives of Jesus and Mary. Sister Lucia dos Santos said “The Most Holy Virgin in these last times in which we live has given a new efficacy to the recitation of the Rosary to such an extent that there is no problem, no matter how difficult it is, whether temporal or above all spiritual, in the personal life of each one of us, of our families...that cannot be solved by the Rosary. There is no problem, I tell you, no matter how difficult it is, that we cannot resolve by the prayer of the Holy Rosary." The Church has always recognized the efficacy of this devotion [John Paul II] said “Through the Rosary the faithful receive abundant grace, as by the hands of the Mother of the Redeemer.