Lutgardis was a 13th-century Benedictine and Cistercian nun from the Low Countries. Born in Tongeren in 1182, she entered a Benedictine monastery at age twelve. After experiencing religious visions, she transitioned to the stricter Cistercian order at Aywières. She is recognized as a significant mystic, particularly noted for her early visions regarding the Sacred Heart of Jesus. Throughout her life, she was known for her intense devotion, her support of the early Dominican and Franciscan orders, and her various spiritual ecstasies. She died in 1246 at the age of 64.