page_title: Early Middle Ages
section_title: Byzantine Empire
hierarchical_section_title: Early Middle Ages / History / Byzantine Empire
context_page_description: Historians typically regard the Early Middle Ages or Early Medieval Period, sometimes referred to as the Dark Ages, as lasting from the 5th or 6th century to the 10th century. They marked the start of the Middle Ages of European history. The alternative term "Late Antiquity" emphasizes elements of continuity with the Roman Empire, while "Early Middle Ages" is used to emphasize developments characteristic of the earlier medieval period. As such the concept overlaps with Late Antiquity, following the decline of the Western Roman Empire, and precedes the High Middle Ages.
  The period saw a continuation of trends evident since late classical antiquity, including population decline, especially in urban centres, a decline of trade, a small rise in global warming and increased migration. In the 19th century the Early Middle Ages were often labelled the "Dark Ages", a characterization based on the relative scarcity of literary and cultural output from this time. However, the Eastern Roman Empire, or Byzantine Empire, continued to survive, though in the 7th century the Rashidun Caliphate and the Umayyad Caliphate conquered swathes of formerly Roman territory.
context_section_description: The death of Theodosius I in 395 was followed by the division of the empire between his two sons. The Western Roman Empire disintegrated into a mosaic of warring Germanic kingdoms in the 5th century, making the Eastern Roman Empire in Constantinople the legal successor to the classical Roman Empire. After Greek replaced Latin as the official language of the Empire, historians refer to the empire as "Byzantine". Westerners would gradually begin to refer to it as "Greek" rather than "Roman". The inhabitants, however, always called themselves Romaioi, or Romans.
  The Eastern Roman Empire aimed to retain control of the trade routes between Europe and the Orient, which made the Empire the richest polity in Europe. Making use of their sophisticated warfare and superior diplomacy, the Byzantines managed to fend off assaults by the migrating barbarians. Their dreams of subduing the Western potentates briefly materialized during the reign of Justinian I in 527–565. Not only did Justinian restore some western territories to the Roman Empire, but he also codified Roman law (with his codification remaining in force in many areas of Europe until the 19th century) and built the largest and the most technically advanced edifice of the Early Middle Ages, the Hagia Sophia. A bubonic plague pandemic, the Plague of Justinian, marred Justinian's reign, however, infecting the Emperor and killing perhaps 40% of the population of Constantinople.
  Justinian's successors Maurice and Heraclius confronted invasions by the Avar and Slavic tribes. After the devastations by the Slavs and the Avars, large areas of the Balkans became depopulated. In 626 Constantinople, by far the largest city of early medieval Europe, withstood a combined siege by Avars and Persians. Within several decades, Heraclius completed a holy war against the Persians, taking their capital and having a Sassanid monarch assassinated. Yet Heraclius lived to see his spectacular success undone by the Muslim conquests of Syria, three Palaestina provinces, Egypt, and North Africa which was considerably facilitated by religious disunity and the proliferation of heretical movements (notably Monophysitism and Nestorianism) in the areas converted to Islam.
  Although Heraclius's successors managed to salvage Constantinople from two Arab sieges (in 674–77 and 717), the empire of the 8th and early 9th century was rocked by the great Iconoclastic Controversy, punctuated by dynastic struggles between various factions at court. The Bulgar and Slavic tribes profited from these disorders and invaded Illyria, Thrace and even Greece. After the decisive victory at Ongala in 680 the armies of the Bulgars and Slavs advanced to the south of the Balkan mountains, defeating again the Byzantines who were then forced to sign a humiliating peace treaty which acknowledged the establishment of the First Bulgarian Empire on the borders of the Empire.
  To counter these threats a new system of administration was introduced. The regional civil and military administration were combined in the hands of a general, or strategos. A theme, which formerly denoted a subdivision of the Byzantine army, came to refer to a region governed by a strategos. The reform led to the emergence of great landed families which controlled the regional military and often pressed their claims to the throne (see Bardas Phocas and Bardas Sklerus for characteristic examples).
  By the early 8th century, notwithstanding the shrinking territory of the empire, Constantinople remained the largest and the wealthiest city west of China, comparable only to Sassanid Ctesiphon, and later Abassid Baghdad. The population of the imperial capital fluctuated between 300,000 and 400,000 as the emperors undertook measures to restrain its growth. The only other large Christian cities were Rome (50,000) and Salonika (30,000). Even before the 8th century was out, the Farmer's Law signalled the resurrection of agricultural technologies in the Roman Empire. As the 2006 Encyclopædia Britannica noted, "the technological base of Byzantine society was more advanced than t
caption: Theodora, Justinian's wife, and her retinue[21]
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