page_title: Byzantine Empire under the Isaurian dynasty
section_title: The Empire in crisis, 705–717
hierarchical_section_title: Byzantine Empire under the Isaurian dynasty / The Empire in crisis, 705–717
context_page_description: The Byzantine Empire was ruled by the Isaurian or Syrian dynasty from 717 to 802. The Isaurian emperors were successful in defending and consolidating the Empire against the Caliphate after the onslaught of the early Muslim conquests, but were less successful in Europe, where they suffered setbacks against the Bulgars, had to give up the Exarchate of Ravenna, and lost influence over Italy and the Papacy to the growing power of the Franks.
  The Isaurian dynasty is chiefly associated with Byzantine Iconoclasm, an attempt to restore divine favour by purifying the Christian faith from excessive adoration of icons, which resulted in considerable internal turmoil.
  By the end of the Isaurian dynasty in 802, the Byzantines were continuing to fight the Arabs and the Bulgars for their very existence, with matters made more complicated when Pope Leo III crowned Charlemagne Imperator Romanorum which was seen as an attempt at making the Carolingian Empire the successor to the Roman Empire.
context_section_description: After Justinian II's second overthrow, the Byzantine Empire spiralled into another era of chaos matched only by Phocas' mishandling of the last Persian War. Philippikos Bardanes, the Crimean rebel who seized the throne proved to be totally incompetent for rule. Rather than face the looming threat of the Bulgars or the Arabs, he intended to reignite the religious controversies by imposing the much hated Heraclian Monothelitism. When King Tervel of Bulgaria (who was an ally of Justinian II) invaded Thrace, Bardanes had no choice but to summon the troops of the Opsician Theme to combat the Bulgars. Unfortunately for the Emperor, the troops had no loyalty whatsoever to him and after the ritual blinding he was replaced in June 713 by the chief secretary of the Emperor, Artemios.
  Artemios was crowned as Anastasios II. Anastasios gave the Empire a brief taste of good leadership, improving the walls of the capital and filling the granaries of the capital to bursting point, in order that the newly reported Arab invasion be dealt with. Every citizen was told to gather enough food for three years for if the Arabs were to reach the straits it would undoubtedly be a lengthy siege. However, Anastasios proved too good for the Empire; in an effort to avert the Arab siege of the Capital, Anastasios planned a preemptive strike against the invaders, using Rhodes as a base. However the Opsician Theme once more revolted and Anastasios found himself in a Thessalonika monastery by 715.
  The Opsicians chose Theodosios, an unwilling tax-collector, to rule the Empire. The choice was hardly based upon his skills; when Leo the Isaurian, strategos of the Anatolic theme, asked the Senate and the Patriarch for his support in becoming emperor, it took little persuading to obtain it.
caption: Map of the Byzantine Empire with its themes ca. 717