Constanti'nus Xi. Ducas
（o( *Dou=kas) emperor of the East, A. D. 1059-1067, was chosen by the emperor Isaac I. Comnenus, who abdicated in 1059, as his successor, in preference to his own children, because he thought him to be the most worthy of his subjects.
It proved, however, that, although Constantine was undoubtedly one of the best subjects of Isaac, he still was not fit to rule in those troublous times. Previously to his election, Constantine had been very active in putting Michael VI. Stratioticus on the throne (A. D. 1056), but he deserted him in the following year and espoused the party of Isaac Comnenus, who succeeded in seizing the government. Thence their friendship arose. When he ascended the throne, the people expected that he would take vigorous measures against those swarms of barbarians who were attacking the empire from all sides, and they were the more justified in their expectations as Constantine was an able general.
But he loved talking quite as much as action, an