The term "Rosary" was not recorded until the year 1597, but the device itself had been around in various forms. How did this particular form of prayer beads start?
There are various stories to explain it. One, mentioned yesterday, is that Peter the Hermit invented it. Another says that it was St. Dominic who introduced it. The Dominic version claims he did not exactly invent it; rather, it was "given" to him in a vision by the Blessed Virgin Mary. This story came about long after his death, however, and during his lifetime was never mentioned.
The idea of a memory aid goes back a long way in Christianity. In the 3rd century CE Christian hermits and monks would use stones or knotted ropes to help them keep their place during the repetitive nature of prayers, such as reciting the 150 Psalms, or praying the Our Father over and over.
In the early 1400s, Dominic of Prussia "organized" the decades of Hail Marys into the Mysteries: Joyful, Sorrowful, and Glorious. There are five of each Mystery, describing different events in the life of Mary and their importance. (An additional set was introduce by Pope John Paul II in October 2002: the Luminous Mysteries.)
Still, the Rosary was not widely used; that is, until a Dominican friar and mystic and theologian came along. Tomorrow I'll introduce you to Alan de la Roche.