Constantine X, Byzantine Emperor (b. 1006)
Constantine X Doukas or Ducas (Greek: Κωνσταντῖνος Δούκας, Kōnstantinos X Doukas, 1006 – 23 May 1067), was Byzantine emperor from 1059 to 1067. He was the founder and first ruling member of the short-lived Doukid dynasty. During his reign, the Normans took over much of the remaining Byzantine territories in Italy while in the Balkans the Hungarians occupied Belgrade. He also suffered defeats by the Seljuk sultan Alp Arslan.