Leo III the Isaurian
Leo III the Isaurian was one of the most consequential Byzantine emperors, whose reign of over two decades fundamentally reshaped the religious, military, and administrative character of the empire. Born in Germanikeia around 685, he rose through military ranks and seized the throne in 717 during a period of severe political instability. His very first year tested him to the extreme: a massive Arab siege of Constantinople from 717 to 718, involving both land and naval forces, threatened the empire's very existence. Leo's brilliant defense, combined with Greek fire deployed against the Arab fleet and the intervention of a harsh winter, repelled the attackers and saved Christendom's eastern bulwark. In 726 Leo ignited the Iconoclast Controversy by ordering the removal of a prominent icon of Christ from the Chalke Gate in Constantinople, and in 730 formally banned the veneration of religious images throughout the empire. This policy created a profound rift with Pope Gregory II and Gregory III, led to the confiscation of papal estates in Italy, and transferred ecclesiastical jurisdiction over Illyricum to Constantinople. Domestically he reformed the law code, producing the Ecloga in 726.
- Lived: 675 CE – 741 CE
- Nationality: byzantine
- Roles: emperor, head_of_state, military_leader
