Charles of Sezze was an Italian Capuchin lay brother born Giancarlo Marchioni in 1613. Despite his parents' wish for him to enter the priesthood, he chose a life of humble service within the Order of Friars Minor. He performed various menial tasks, including working as a gardener, porter, and cook. Known for his profound spirituality, he became a sought-after advisor for noble families and several popes, including Innocent X and Clement IX. He is remembered for his ascetic lifestyle and his significant contributions to religious literature.