Joan Elizabeth Lucy Bichier des Âges was a French religious sister, commonly referred to as Elizabeth Bichier. Together with Andrew Fournet, she founded the Sisters of the Cross, Sisters of St. Andrew, a religious congregation which was established for the care of the poor and the instruction of rural children in the Diocese of Poitiers in 1807. She also helped to inspire the founding of a community of priests dedicated to missionary service, the Congregation of the Sacred Heart of Jesus of Betharram. She has been declared a saint by the Catholic Church.