Marie de Mézières was a notable figure in the 14th century, known for her role as a mystic and visionary. She was born in France and became a member of the Carmelite order. Her writings and experiences contributed to the spiritual landscape of her time, emphasizing themes of divine love and personal transformation. Her most significant work, "The Book of the Divine Love," reflects her deep spiritual insights and experiences. Marie's visions often included encounters with Christ and the Virgin Mary, which inspired her followers and influenced the Carmelite spirituality that emerged in the late medieval period.