Mosaic portraying Theodore Metochites (left), mesazon to Emperor Andronikos II Palaiologos (r. 1282–1328), presenting the model of the renovated Chora Church to Christ Pantocrator.

The mesazon (Greek: μεσάζων, romanizedmesazōn, lit.'intermediary') was a high dignitary and official during the last centuries of the Byzantine Empire, who acted as the chief minister and principal aide of the Byzantine emperor.

History and functions

The term's origins lie in the 10th century, when senior ministers were sometimes referred to as the mesiteuontes (μεσιτεύοντες), i.e. 'mediators' between the emperor and his subjects (cf. paradynasteuon). The title first became official in the mid-11th century, when it was conferred to Constantine Leichoudes, the future Ecumenical Patriarch of Constantinople.[1] In the Komnenian period, it was awarded to senior government officials who functioned as de facto prime ministers, such as the epi tou kanikleiou and the logothetes ton sekreton, but had not yet acquired a permanent and specific function, nor the power that would characterize it in later years.[1][2] Rather, it was a title bestowed on the principal imperial secretary of the moment, who acted precisely as an "intermediary" between the emperor and other officials.[3][4] This reflected the shift of the Byzantine government under the Komnenoi from the old Roman-style bureaucracy to a more restricted, aristocratic ruling class, where government was exercised within the imperial household, as in feudal Western Europe.[5]

The office of mesazon became formally institutionalized in the Empire of Nicaea,[6] where the holder of the mesastikion (as the function had become known), served as the Empire's chief minister, coordinating the other ministers.[5] As the emperor and historian John VI Kantakouzenos (r. 1347–1354) records, the mesazon was "needed by the emperor day and night".[1] This arrangement was inherited by the restored Palaiologan-era Empire and continued in use until the Fall of Constantinople in May 1453. The office was also used in the same function in the Byzantine courts of Epirus, Morea, and Trebizond. In the latter case, it acquired the epithet megas ('great').[1]

List of mesazontes


  1. ^ a b c d ODB, "Mesazon" (A. Kazhdan), p. 1346.
  2. ^ Magdalino 2002, pp. 252, 258.
  3. ^ Angold 1975, p. 147.
  4. ^ Haldon 2009, p. 544.
  5. ^ a b Haldon 2009, p. 545.
  6. ^ Angold 1975, p. 149.
  7. ^ Andriopoulou, Vera (2016-09-17). "The Logistics of a Union: Diplomatic Communication through the Eyes of Sylvester Syropoulos". Sylvester Syropoulos on Politics and Culture in the Fifteenth-Century Mediterranean: Themes and Problems in the Memoirs, Section IV. Routledge. ISBN 978-1-317-04731-5.
  8. ^ Çelik, Siren (2021). Manuel II Palaiologos (1350–1425). Cambridge University Press. pp. xxii. ISBN 978-1-108-83659-3.
  9. ^ Virgilio, Carlo (2015). Florence, Byzantium and the Ottomans (1439-1481). Politics and Economics (PhD thesis). University of Birmingham. pp. 51, 53, 56