Louis-Marie Grignion de Montfort was a French Roman Catholic priest and confessor. He was known in his time as a preacher and was made a missionary apostolic by Pope Clement XI.
As well as preaching, Montfort found time to write a number of books which went on to become classic Catholic titles and influenced several popes. Montfort is known for his particular devotion to the Blessed Virgin Mary and the practice of praying the Rosary.
Montfort is considered one of the early writers in the field of Mariology. His most notable works regarding Marian devotions are contained in Secret of the Rosary and True Devotion to Mary.
Wikipedia https://en.wikipedia.org/wiki/Louis_de_Montfort
Address (Unnamed Road), Le Calvaire 44160, France
Coordinates 47°26'30.182" N -2°8'2.397" E