The great increase in the whole intercessory machinery of the Church culminated in the adoration of the Virgin Mary. The extravagant expression of this devotion was widespread. For the many it found vent in the language of popular hymns. Among the monks the Cistercians were under her special protection, and all their churches were dedicated to her. Of the learned men Peter Damiani in the eleventh century, St. Bernard and St. Bonaventura in the two succeeding centuries respectively, especially helped in various ways to crystallise her position in the Church. As a result of the efforts of her devotees Saturdays and the vigils of all feast days came to be kept in her honour; the salutation "_Ave Maria gratia plena_" with certain additions was prescribed to be taught to the people, together with the Lord's Prayer and the Creed. In the thirteenth century its frequent repetition resulted in the invention of the Rosary, a string of beads by which the number of repetitions could be counted. The religion of Mary soon showed signs of development as a parallel religion to that of Christ. She is styled the Queen of Heaven; her office, composed by Peter Damiani, was ordered by Urban II to be recited on Saturday; and a Marian Psalter and a Marian Bible were actually composed; while in place of the _didia_ or reverence offered to the saints, there was claimed for the Virgin a higher step, a _hyperdulia_, which St. Thomas places between _dulia_ and the latria or adoration paid to Christ. [Sidenote: The immaculate conception.]