Princess Constance of Greater Poland (b. c.1245)
Constance of Greater Poland (also known as of Poznań) (Polish: Konstancja wielkopolska (poznańska)) (1245/46 – 8 October 1281) was a princess of Greater Poland, a member of the House of Piast, and by marriage a Margravine of Brandenburg–Stendal.

She was the eldest daughter of Przemysł I, Duke of Greater Poland and Poznań, by his wife Elisabeth, daughter of Henry II the Pious, Duke of Wrocław. She was probably named after her maternal aunt Constance, second wife of Casimir I, Duke of Kuyavia.