Constantine X Doukas was the ruler of the Byzantine Empire from 1059 to 1067 CE. During his reign, the Byzantine Empire was attacked by emerging enemies on all sides, including the Normans in Italy and the Seljuk Turks in Armenia and Anatolia. Constantine's policies isolated the Monophysite Armenians, downsized the army at the worst possible moment, and contributed to the general decline of Byzantium during the second half of the 11th century CE. Although Constantine was a poor emperor, it was his successors who would have to bear his unhelpful legacy.
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Timeline
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1059Isaac I Komnenos steps down as Byzantine emperor due to illness and appoints Constantine X Doukas as his successor.
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1060Constantine X Doukas escapes an assassination plot in Constantinople.
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16 Aug 1064Seljuk Turks, under Alp Arslan, sack the former Armenian capital of Ani, then under Byzantine control.
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1066The first Norman fleet is assembled to attack the Byzantine-held Balkans.
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22 May 1067Constantine X Doukas dies in Constantinople from an illness.
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1068The Normans under Robert Guiscard begin the three-year siege of Bari, the Byzantine provincial capital of southern Italy.
