doukas (lat. dux)
Antiquity: Roman military commander who, in some provinces, combined military and civil functions.Buzantium: a higher military officer. From the second half of the 10th c. the title indicates the military comander of a larger district. After the 12th c., doukes were called the governors of small themes.
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kouropalates
A high-ranking dignity, which from Justinian I was conferred on members of the imperial family and on foreign princes. During the 11th c. it was conferred on several generals, not belonging to the imperial family.
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magistros
Higher office that Philotheos in his Kletorologion places above the anthypatos. This title lost its importance from the 10th century and gradually disappeared - most probably in the middle of the 12th century.
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sebastokrator
Honorary title of the Byzantine court. The office was established in 1081 by Alexios I Komnenos for his elder brother Isaac, equivalent to the one of regent
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sebastos
("venerable") Title of honour created by Constantine IX the Monomachos in the middle of the 11th century. Originated from the translation of the imperial adjective augustus. This title was given successively to the two mistresses of the emperor.
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strategos ("general")
During the Roman period his duties were mainly political. Οffice of the Byzantine state´s provincial administration. At first the title was given to the military and political administrator of the themes, namely of the big geographic and administrative unities of the Byzantine empire. Gradually the title lost its power and, already in the 11th century, strategoi were turned to simple commanders of military units, responsible for the defence of a region.
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