Michael IX Palaiologos or Palaeologus (Greek: Μιχαήλ Θ΄ Παλαιολόγος, Mikhaēl IX Palaiologos), (17 April 1277 – 12 October 1320, Thessalonica, reigned as Byzantine co-emperor with full imperial style 1294/1295–1320. Michael IX was the eldest son of Andronikos II Palaiologos and Anna of Hungary,[1] daughter of Stephen V of Hungary.