Leo III the Isaurian (Leōn ho Isauros; Leo Isaurus; 685 – 18 June 741), also known as the Syrian, was Byzantine Emperor from 717 until his death in 741 and founder of the Isaurian dynasty. He put an end to the Twenty Years' Anarchy, a period of great instability in the Byzantine Empire between 695 and 717, marked by the rapid succession of several emperors to the throne. He also successfully defended the Empire against the invading Umayyads and forbade the veneration of icons.
Leo III was born in Germanikeia, Commagene, which is in modern Kahramanmaraş in Turkey. His original name was Konon (Κόνων; Conon or Cononus). Leo III was fluent in Arabic, possibly as a native language, and was described by Theophanes the Confessor as "the Saracen minded."
After the victory of Justinian II, Konon was dispatched on a diplomatic mission to Alania and Lazica to organize an alliance against the Umayyad caliphate under Al-Walid I. According to the chronicle written by Theophane