The author of The Secret of the Rosary and the originator of total consecration to Mary, St. Louis-Marie Grignion De Montfort (1673-1716) remains one of the greatest apostles of Marian devotion the world has ever known. As a young priest, De Montfort dedicated himself to preaching to the people. This highly gifted orator's language was simple but full of divine love, much as you will find in True Devotion to Mary. De Montfort s whole life was marked by constant prayer, love for the poor and holy joy in humiliations and persecutions. De Montfort was canonized by Pius XII in 1947.