Baroque France (17th century)
Feast: March 15
An illegitimate noblewoman who battled depression for decades — then co-founded the most revolutionary women's religious order in history.
Louise de Marillac spent years stuck. She was born out of wedlock to an aristocratic father, married a royal secretary who died young, and raised a son she constantly worried about. Depression dogged her — she called it her 'interior darkness' — and at one point she was so anxious about her vocation that she could barely function. Then she met Vincent de Paul. Their partnership changed the Catholic Church. Together they created the Daughters of Charity, a community of women who made no solemn vows, wore no habit (just the grey dress of Parisian peasant women), and lived not in convents but in the homes of the sick. This was unheard of. Every previous attempt at uncloistered religious life for women had been shut down by Church authorities. Louise made it work through sheer organizational skill — she wrote constitutions, trained nurses, inspected hospitals, and managed supply chains for the poor. She was practical where Vincent was visionary. By the time she died in 1660, just days before Vincent himself, the Daughters had spread across France. Today they are the largest congregation of women religious in the world.