caesar
In the Roman Empire the title of Caesar was given to the Emperor. From the reign of Diocletian (284-305) on this title was conferred on the young co-emperor. This was also the highest title on the hierarchy of the Byzantine court. In the 8th c. the title of Caesar was usually given to the successor of the throne. In the late 11th c. this office was downgraded and from the 14th c. on it was mainly conferred on foreign princes.
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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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protostrator
A Byzantine military office, accorded to the chief of imperial stratores or hippokomoi («grooms»). The title is first mentionned in the 8th century. In the 9th and 10th century, his major duty was to accompany the Emperor while on horseback. In the 12th century he was one of the highest officials of the Byzantine court and he also commanded troops.
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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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