Christine de Pizan or Pisan (French pronunciation: [kʁistin də pizɑ̃] ), born Cristina da Pizzano (1364 – c. 1430), was a poet and author at the court of King Charles VI of France and several French dukes. Venetian by birth, Christine served as a court writer in medieval France after the death of her husband. Christine's patrons included dukes Louis I of Orleans, Philip the Bold of Burgundy, and his son John the Fearless. Her best known works include The Book of the City of Ladies and The Treasure of the City of Ladies, both written when she worked for John the Fearless of Burgundy. Her books of advice to princesses, princes, and knights remained in print until the 16th century.