"Constantine X Doukas or Dukas, Latinised as Ducas (Greek: Κωνσταντῖνος Ι΄ Δούκας, Kōnstantinos X Doukas, 1006 – 22 May 1067) was Byzantine Emperor from 1059 to 1067. He was ...
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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 against the Seljuk sultan Alp Arslan." - (en.wikipedia.org 12.12.2019)
