Marie-Catherine Troiani was an Italian nun born in 1813 in Giuliano di Roma. After losing her parents at the age of six, she eventually joined the Third Order of Saint Francis. She is best known for her missionary efforts, which led her to travel to Egypt in 1859. There, she established an educational institute and founded the Franciscan Missionaries of the Immaculate Heart. She served as the Mother Superior of her congregation until her death in Cairo in 1887.