Charles of Sezze - born Giancarlo Marchioni - was an Italian professed religious from the Order of Friars Minor. He became a religious despite the opposition of his parents who wanted him to become a priest and he led an austere life doing menial tasks such as acting as a porter and gardener; he was also a noted writer. He was also held in high esteem across the Lazio region with noble families like the Colonna and Orsini praising him and seeking his counsel as did popes such as Innocent X and Clement IX.