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Research / Clusters / Politics: Power and Institutions
Institutions of the Byzantine Empire

Administrative Institutions of the Middle Byzantine State

Christos Malatras

Research coordinator
Christos MalatrasAssociate Researcher

This research programme focuses primarily on the study of the state institutions of the middle Byzantine Empire. It examines the various state offices, the system of titles and the imperial hierarchy, as well as the provincial administration of Byzantium, with a particular focus on specific regions of the Eastern Mediterranean. Ultimately, it seeks to trace the overall development of the administrative structure of the Byzantine state.

  • Christos Malatras, The early genikoi logothetai: status, seals and prosopography (mid-7th to mid-9th c.), in P. Charalampakis (ed.), In memoriam Jordanov, Sofia 2026 (in print).
  • Christos Malatras, Civil authority in the Byzantine provinces (7th–9th Centuries), Studia Ceranea 14 (2024), 463-499.
  • Christos Malatras, The early history of the thema of the Boukellarioi (8th century), BZ 116.1 (2023), 127-164.
  • Christos Malatras, An unpublished seal of Konstantinos Philosophos, his family, and the thema of the Islands, ZRVI 59 (2022), 27-53.
  • Christos Malatras, TAKTIKON: Studies on the Prosopography and Administration of the Byzantine themata, Academy of Athens: Athens 2021 (in collaboration with Dr Olga Karagiorgou and Dr Pantelis Charalampakis, 900 pp.)
  • Christos Malatras, The thema of the Anatolikoi: prosopography and administrative structure, in Olga Karagiorgou, Pantelis Charalampakis, Christos Malatras (eds.), TAKTIKON: Studies on the Prosopography and Administration of the Byzantine themata, Academy of Athens: Athens 2021, 277-401.
  • Christos Malatras, In the service of the imperial Opsikion: the corpus of officials, in Olga Karagiorgou, Pantelis Charalampakis, Christos Malatras (eds.), TAKTIKON: Studies on the Prosopography and Administration of the Byzantine themata, Academy of Athens: Athens 2021, 411-512.
  • Christos Malatras, Το Αιγαίο, οι Κυκλάδες και η θέση της Πάρου στο διοικητικό σύστημα κατά τη βυζαντινή εποχή, στο D. Katsonopoulou (ed.), Paros through the ages – from prehistoric times to the 16th century AD, Paros V, Paros 2021, 437-460.
  • Christos Malatras, Some seals from officials of the theme of Seleukeia, στο ΧΕΡΣΩΝΟΣ ΘΕΜΑΤΑ: Империя и Полис. XI Международный Византийский Семинар: Материалы Научной конференции, Sevastopol 2019 (together with Pantelis Charalampakis), 227-232.
  • Christos Malatras, State officials in the themes of Opsikion, the Anatolikoi and the Kibyrraiotai: new and recently revisited sigillographic evidence, Βυζαντινά Σύμμεικτα 26 (2016), 247-308 (together with Olga Karagiorgou and Pantelis Charalampakis).

  • Christos Malatras, The logothetai of the stratiotikon (7th-11th c.), in the XIVth International Symposium of Byzantine Sigillography, 6-9 September 2025, Cologne.
  • Christos Malatras, Sealing patterns of officials in the seventh century and the question of thematic administration, in The Quaestura Exercitus in its Regional Context: Historical and Archaeological Perspectives, 16-19 September 2025, Varna (Bulgaria).
  • Christos Malatras, Addenda and Corrigenda in the TAKTIKON (2021), in the XIIIth International Symposium of Byzantine Sigillography, 27-29 March 2025, Cologne.
  • Christos Malatras, Mobility, social status, and identity of the Byzantine officials (7th-9th c.): the evidence of seals, lecture in the Annual General Meeting of the Research centre UMR 8167: Orient et Méditerranée, Sorbonne University, 24 May 2025, Paris.
  • Christos Malatras, Addenda and Corrigenda in the TAKTIKON (2021), in the XIIIth International Symposium of Byzantine Sigillography, 27-29 March 2025, Cologne.
  • Christos Malatras, State functionaries in Byzantium: a social and cultural study (7th-9th c.), lecture in Sorbonne University, 25 September 2024.
  • Christos Malatras, Civil Administration in the Byzantine provinces (7th–9th Centuries), in Colloquia Ceranea V, 11-13 May 2023, Lodz (Poland).
  • Christos Malatras, Changes in Civil Administration During the Emergence of the Thematic System (7th–9th Centuries), in the 24th International Congress of Byzantine Studies, 22-27 August 2022, Venice and Padua.
  • Christos Malatras, Networks and mobility of the state functionaries during the “Dark Ages“, in the Arbeitstagung der deutschen Arbeitsgemeinschaft zur Förderung Byzantinischer Studien, 17–18 February 2022, Münster (Germany).
  • Christos Malatras, Byzantine lead seals and the mobility of functionaries in the Early Medieval period, invited lecture on 10/01/2022 at the Eberhard Karls University of Tübingen (Germany).
  • Christos Malatras, The contribution of sigillography to the Byzantine institutional history, in Bizans Sigillografisi Çalıştayı for Bizantolog and the Stavros Niarchos Center for Late Antique and Byzantine Studies (GABAM), Koç University, 20-21 September 2021 (online due to COVID-19 pandemic). https://www.youtube.com/watch?v=UidA1OdCQ58&ab_channel=Bizantolog
  • Christos Malatras, Byzantine lead seals as a source for Byzantine institutional history, invited lecture on 02 December 2020 at the Institute for the History of Ancient Civilizations (IHAC), Northeast Normal University, Changchun, China (online due to the COVID-19 pandemic).
  • Christos Malatras, Provincial administration in Byzantium in the light of lead seals, seminar in the Sigidoc Autumn School: Encoding Byzantine seals, 2-6 November 2020. Cologne, Germany (online due to the COVID-19 pandemic). https://www.academia.edu/video/1Mv2rl
  • Christos Malatras, The Middle Byzantine Aegean: Administration, Officials and their Seals, seminar in the Byzantinischen Sigillographischen Kolloquium, University of Cologne, 10 June 2020 (online due to the COVID-19 pandemic).
  • Christos Malatras, The mobility of Byzantine provincial officials: the evidence of lead seals, in the 2019 International Medieval Congress, 2-5 July 2019, Leeds (United Kingdom).
  • Christos Malatras, Η θέση της Πάρου στο διοικητικό σύστημα κατά την μέση βυζαντινή περίοδο, in Fifth International Conference on the archaeology of Paros and the Cyclades (Paros V), 21-24 June 2019, Paros (Greece).
  • Christos Malatras, Some seals from officials of the theme of Seleukeia, in ΧI International Crimean Byzantine Seminar «ΧΕΡΣΩΝΟΣ ΘΕΜΑΤΑ: EMPIRE AND POLIS», 3-7 June 2019, Sevastopol (together with Pantelis Charalampakis).
  • Christos Malatras, Administering the waters: new sigillographic evidence on the administration of the Aegean in XIIth International Symposium of Byzantine Sigillography, 28-30 May 2019, Saint Petersburg, Russia.
  • Christos Malatras, The administration of the Aegean in the middle Byzantine period (7th-12th c., in Arbeitstagung der Deutschen Arbeitsgemeinschaft zur Förderung Byzantinischer Studien, 14-16 February 2019, Hamburg.
  • Christos Malatras, Byzantine lead seals of the theme of Samos, in International Symposium on the port cities of the Aegean world: coins, seals and weights, 1-2 November 2017, Smyrna and Magnesia (Turkey).
  • Christos Malatras, TAKTIKON: The online research tool on Byzantine themes, in 23rd International Congress of Byzantine Studies, 22-27 August 2016, Belgrade (together with O. Karagiorgou and P. Charalampakis).
  • Christos Malatras, Το ψηφιακό ΤΑΚΤΙΚΟΝ: Ένα νέο εργαλείο για τη μελέτη των θεματικών θεσμών. To παράδειγμα του Οψικίου in the 1st Meeting of Greek Byzantinists, 16-18 December 2015, Athens.
  • Christos Malatras, The sigillographic corpus of Opsikion, in The prosopography of the thematic administration: old and new evidence on the Opsikion, the Anatolikoi and the Kibyrraiotai, 19 June 2015, Academy of Athens.
  • Christos Malatras, The sigillographic corpus of the theme of the Anatolikoi, in The prosopography of the thematic administration: old and new evidence on the Opsikion, the Anatolikoi and the Kibyrraiotai, 19 June 2015, Academy of Athens (together with Pantelis Charalampakis).

  • Christos Malatras, 2024: Teaching in the Department of Byzantine and Modern Greek Studies of the University of Cologne of the module “Rang- und Ämterstruktur in Byzanz im Lichte byzantinischer Bleisiegel” (spring semester).
Research coordinator
Christos MalatrasAssociate Researcher
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Christos Malatras
Associate Researcher