Office of the Blessed Virgin Mary:
According to the Use of the Carmelite Order

Down to the Reformation the Little Office of Our Lady formed a large part of the "Primer or Lay-folk's Prayer-book," and was customarily recited by the devout laity, by whom the practice was continued for long afterwards among the persecuted Catholics. Today it is recited daily by Dominican, Carmelite, Augustinian, and by large numbers of the Franciscan, Tertiaries, as well as by many pious laymen who desire to take part in the liturgical prayer of the Church.