Louis de Montfort was a French priest and missionary born in 1673 who became a significant figure in Catholic Mariology. After studying in Paris, he dedicated his life to preaching missions to the poor and establishing religious communities, including the Company of Mary. His theological writings, such as *True Devotion to Mary*, have had a lasting impact on the Church and influenced numerous popes. He spent his final years traveling extensively to conduct missions and founding schools for children before his death in 1716.