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The tzaousios (Greek: τζαούσιος) was a late Byzantine military office, whose exact functions and role are somewhat unclear.[1]

The term is derived from the Turkish çavuş, meaning "courier" or "messenger",[1] and was in use by the Byzantines perhaps as early as the late 11th century.[2] In the 13th–15th centuries, it became applied to officers serving in provincial posts. A tzaousios could serve as commander of the garrison of a kastron (a fortified administrative center run by a kephale), possibly combining the military and administrative roles, or as an officer to the megala allagia of the imperial field army.[1][2] Most of the tzaousioi mentioned in the sources came from the Byzantine Morea,[3] where they played an important role in provincial administration. In Macedonia and Thrace by contrast, they seem to have been limited to a purely military role within the megala allagia.[2]

The variant megas tzaousios (μέγας τζαούσιος, "grand tzaousios") is a court title first attested under John III Vatatzes (r. 1221–1254). His functions are unclear.[4] The French Byzantinist Rodolphe Guilland suggested that he was in command of subordinated tzaousioi, who acted as the successors of the earlier imperial courier corps, the mandatores.[5] In pseudo-Kodinos's mid-14th century Book of Offices, he is described as being responsible for maintaining the order of the imperial retinue.[3] Certainly, the first megas tzaousios, Constantine Margarites, was the commander of Vatazes's personal retinue,[6] but in later times, the title does not appear to have corresponded to a specific function.[7]

See also


  1. ^ a b c Kazhdan 1991, p. 2135.
  2. ^ a b c Bartusis 1997, p. 194.
  3. ^ a b Kazhdan 1991, p. 2136.
  4. ^ Kazhdan 1991, pp. 2135–2136.
  5. ^ Guilland 1967, p. 605 (Note #35).
  6. ^ Bartusis 1997, pp. 370–371.
  7. ^ Bartusis 1997, p. 382.


  • Bartusis, Mark C. (1997). The Late Byzantine Army: Arms and Society 1204–1453. Philadelphia, Pennsylvania: University of Pennsylvania Press. ISBN 0-8122-1620-2.
  • Guilland, Rodolphe (1967). "Dignitaires des XIVe et XVe siècles". Recherches sur les institutions byzantines [Studies on the Byzantine Institutions]. Berliner byzantinische Arbeiten 35 (in French). Vol. I. Berlin and Amsterdam: Akademie-Verlag & Adolf M. Hakkert. pp. 594–607. OCLC 878894516.
  • Kazhdan, Alexander (1991). "Tzaousios". In Kazhdan, Alexander (ed.). The Oxford Dictionary of Byzantium. Oxford and New York: Oxford University Press. ISBN 0-19-504652-8.
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