Byzantine Government and Administration

The government of the Byzantine Empire was the most sophisticated administrative system in the early Middle Ages. It was, in essence, the late Roman imperial administration carried forward in modified form for another seven centuries after the western collapse, and its survival is one of the defining features of the medieval eastern Roman state. The emperor, conceived as God’s chosen vicegerent on earth, ruled an empire of provinces, themes, and a sprawling capital city through a hierarchy of eunuch officials, provincial governors, military commanders, and tax collectors. The resulting system was at once autocratic, legalistic, ceremonial, and remarkably durable.

This article forms part of the broader survey of the Byzantine Empire and links to related treatments of the reign of Justinian, Byzantine religion and the Orthodox Church, and Byzantine economy and trade. The bureaucratic self-understanding of the Byzantines is also addressed in why the Byzantines called themselves Romans.

The Emperor as Autocrat

The Byzantine emperor was an absolute monarch in theory, although in practice every ruler had to negotiate with the army, the aristocracy, the senate, the Church, and the mob of the hippodrome. The imperial title was basileus (Greek for “king,” with strong imperial overtones) or, in the early period, imperator, and the emperor was understood to be God’s chosen deputy on earth, charged with ruling the Christian oikoumene in cooperation with the Church. From the time of Constantine, the emperor’s role as a Christian ruler was integral to the office; even iconoclast emperors, who rejected the cult of images, presented themselves as defenders of true Christian belief. The emperor’s coronation was an ecclesiastical ceremony conducted by the Patriarch of Constantinople in the Great Church, an arrangement that made the imperial and ecclesiastical authorities mutually dependent.

In the court, the emperor was surrounded by elaborate ceremony. His subjects approached him in proskynesis, a deep bow or prostration reserved for the sacred person of the ruler. The emperor’s robes, his shoes, his crown, and his regalia were carefully defined objects of imperial cult. Within the Great Palace and later the Blachernae Palace, the emperor lived a life of elaborate ritual chronicled in the tenth-century De Ceremoniis of Constantine VII Porphyrogenitus. The formality was not merely decorative: it was an essential part of the imperial self-presentation that allowed autocratic power to be exercised in a culture deeply suspicious of tyranny and accustomed to the Roman tradition of lawful government. The emperor’s authority was, in theory, constrained by the law he administered; the Code of Justinian, a comprehensive compilation of Roman law commissioned in the sixth century, served as the legal framework within which the imperial will operated.

The Central Bureaucracy

The emperor ruled through a complex central administration staffed by a mixture of lay aristocrats, military officers, and especially eunuchs. The highest officials included:

The Praepositus Sacri Cubiculi, the chief eunuch of the imperial bedchamber, often the most powerful figure in the palace.
The Sacellarius, the imperial treasurer.
The Magister Officiorum, the master of offices, who supervised the central bureaus, the postal service (cursus publicus), and the imperial arsenals.
The Quaestor Sacri Palatii, the quaestor of the sacred palace, who drafted laws and represented the emperor in judicial proceedings.
The Comes Sacrarum Largitionum, the count of sacred largesses, who managed the imperial mints and the production of state regalia.
The Logothetes, finance ministers in the middle and later Byzantine period, who supervised taxation, the treasury, and the imperial estates.
The Magiros, the chief steward of the imperial household, and various palace officials (koubikoularios, kouropalates, proedros).

The central government was thus far more elaborate than anything the early medieval west could produce. While the Merovingian and Carolingian kings were attempting to govern large territories through wandering royal courts and local counts, the Byzantine emperor ruled from a fixed capital through a written bureaucracy, a tax-collecting apparatus, and a salaried civil service, all of which could in principle be redeployed or overruled by the imperial will.

The Senate

The Senate of Constantinople, founded by Constantine in imitation of the Roman Senate, was originally a body of the senatorial aristocracy, owners of large estates in the eastern provinces. By the sixth century it had lost most of its political importance, although senatorial rank continued to be highly prized. Members of the Senate held honorific titles (clarissimus, spectabilis, illustris) and were entitled to attend imperial audiences and processions. The Senate did, in extraordinary circumstances, take political action: it acclaimed new emperors, and during the Nika riots of 532, the rioters briefly forced the Senate to acclaim a rival emperor. For that crisis, see the Nika riots.

In the later Macedonian and Comnenian periods, the Senate revived somewhat as a ceremonial body, and senatorial titles became more widely distributed. The senatorial order remained an important part of the imperial social structure, and members of the senatorial families often staffed the highest offices.

Provincial Administration: Dioceses and Themes

In the fourth and fifth centuries, the empire was organized into dioceses (regional groups of provinces), each governed by a vicar under the supervision of a praetorian prefect. The four praetorian prefectures were the East, Illyricum, Italy, and the Gauls, the last of which was soon lost to the empire. Within each prefecture, the vicars of the dioceses (Thrace, Asia, Pontus, the East, Egypt, etc.) and the provincial governors (consulares, correctores, praesides) administered justice, collected taxes, and maintained the roads.

This late Roman system, however, could not survive the seventh-century crisis. The territorial losses to Persians, Avars, Slavs, and Arabs, the demographic catastrophe of the plague, and the fiscal pressure of mounting military expenditure forced a comprehensive reorganization. The new system was the theme system (from themata — military districts), in which a general, the strategos, governed a large region of Anatolia or the Balkans that combined civil and military authority. Each theme had its own troops, recruited and equipped from local soldier-farmers who held hereditary military lands in exchange for service. The themes of Anatolia — the Anatolics, the Armeniacs, the Thrakesion, the Opsikion, and the later Cappadocian and Charsian themes — formed the heart of the empire’s military strength.

The theme system was not merely a military reform: it was a complete reorganization of the relationship between the state and its citizens. By settling soldiers on their own lands, the empire reduced the tax burden on the military population and made recruitment self-sustaining. By combining civil and military authority in the hands of the strategos, the empire reduced the complexity of the late Roman bureaucracy. The Macedonian dynasty of the ninth and tenth centuries, however, found the system creaking under the strain of the empire’s recovery; the strategos was increasingly subordinated to civilian judges, and the themes were subdivided into smaller units, sometimes governed by a tourmarches or kleisouriarch, as the empire’s needs changed.

The Imperial Church

The patriarchate of Constantinople was an integral part of the imperial administration, not a separate jurisdiction. The Patriarch of Constantinople was appointed by the emperor, presided over the Great Church of Hagia Sophia, and supervised the bishops of the empire’s eastern dioceses. The patriarch was also the senior religious figure in the empire’s Christian life, and the cooperation (and sometimes the conflict) between the patriarch and the emperor shaped the religious policy of the state. The patriarch, for example, presided over the Ecumenical Councils of the fourth to eighth centuries, the religious decisions of which were issued as imperial laws.

The relationship between the church and the imperial government is examined in the Byzantine religion and the Orthodox Church. The administration of the empire’s monasteries, the appointment of bishops, the supervision of charitable foundations (the ptocheion or poorhouse, the gerokomeion or hospital, the xenon for travelers), and the regulation of Christian doctrine all fell under a combination of imperial and patriarchal authority. The Byzantines never drew a sharp line between “secular” and “religious” administration; both were aspects of the same Christian Roman state.

Law and Justice

The legal system of Byzantium, descending directly from the Roman legal tradition, was one of the most elaborate of the medieval world. Justinian’s Corpus Juris Civilis of 528–534, treated in the Code of Justinian, was the most ambitious compilation, and although the empire increasingly used Greek rather than Latin, the Corpus remained the legal reference point for centuries. Under the Macedonian dynasty, a new Greek compilation, the Basilika, was issued under the emperor Leo VI, simplifying and codifying the older Roman materials.

Justice was administered by a hierarchy of courts. Provincial governors judged in their own courts; the quaestor of the imperial palace drafted legal opinions; the emperor himself heard appeals and issued novel laws; the patriarch had jurisdiction over cases involving marriage, divorce, and other matters of family and religious law. The Byzantines inherited the Roman law of persons, property, contracts, delicts, and inheritance, and they refined it through the great legal commentaries of the Macedonian period, the Eisagoge and the Prochiron.

Foreign Service and Diplomacy

The Byzantine Empire maintained a remarkably active diplomatic service, one of the most developed of the early Middle Ages. The Magister Officiorum in earlier periods and the Logothete of the Drome in later periods supervised foreign intelligence and diplomacy. Foreign envoys were received at the Great Palace in elaborate ceremonies documented in the De Ceremoniis; foreign rulers were addressed with elaborate titles (archon for lesser rulers, basileus for the Bulgarian tsar, khagan for the Khazar); and diplomatic gifts — silks, jewels, relics, gold coin — were exchanged with great care.

The Byzantines used marriage diplomacy, religious diplomacy, and occasionally bribery to manage their relations with the various peoples surrounding the empire. The mission of the Cyril and Methodius to Great Moravia in the 860s, for example, was a major piece of ecclesiastical diplomacy intended to draw the Slavic principalities into the orbit of Constantinople; the conversion of the Bulgars and the Rus’ in the ninth and tenth centuries were the long-term successes of such diplomatic and missionary work.

Self-Understanding

The Byzantines understood their state as the Roman Empire, ruled by the legitimate successors of Augustus and Constantine from the New Rome. This self-understanding, addressed in why the Byzantines called themselves Romans, was not mere propaganda: the institutions, the laws, the bureaucracy, the army, and the ceremonial of the empire were, in fact, continuous with the late Roman state. When the Carolingian ruler Charlemagne was crowned emperor in 800, the Byzantines regarded the act as a usurpation, and the resulting tension shaped medieval European politics for centuries.