Meditation is an integral part of the rosary. This mode of meditation is the process of reflecting on the mysteries of the rosary. With practice, this may in time turn into contemplation on the mysteries. The practice of meditation during the praying of repeated Hail Marys dates back to 15th century Carthusian monks, and was soon adopted by the Dominicans at large. By the 16th century the practice of meditation during the rosary had spread across Europe, and the book "Meditationi del Rosario della Gloriosa Maria Virgine" (i.e. Meditations on the Rosary of the Glorious Virgin Mary) printed in 1569 for the rosary confraternity of Milan provided an individual meditation to accompany each bead or prayer.