It was the custom in the Middle Ages, as formerly among the Romans, for noble personages to wear crowns of flowers called chaplets, which later on became the golden diadems worn by kings. These crowns were offered to persons of distinction as a feudal due.
The Virgin, as Queen of Heaven and of souls, has a right to the same homage: wherefore the Church asks us to recognise the title of Mary as Queen of the Holy Rosary, and she exhorts us to offer to her as Daughter of the Father, Mother of the Son and Spouse of the Holy Ghost a triple chaplet or three crowns of roses, of which she shows us all the beauties in to-day’s office, and to which she has given the name of rosary.
The Collect reminds us that the Rosary is a mental prayer in which we meditate on the mysteries of the life, death and resurrection of Jesus; with these Mary was intimately associated. The Gospel, which gives us the chief part of the angelical salutation, shows us that the Rosary is a vocal prayer. The Pater, Credo and Gloria, which are recited with the Ave Marias, are also found in the Mass or in the Divine Office.
The rosary, as a private devotion, consists therefore of elements taken from the liturgical Cycle, and as a solemnity of the Church it forms part of the Cycle.
Image and text taken from the St Andrews Daily Missal, 1928