518 Anastasius I dies without heir; the chief chamberlain Amantius gives money to the commander of the palace guard, Justin, to bribe the soldiers to acclaim Amantius' favorite; instead, Justin bribes them to acclaim himself. Being recognized by army, the Senate follows, and the patriarch crowns Justin.
Reign coincides with the second reign of the Sasanian king Kavad I
Active policy against monophysitism
519 Consul (with Flavius Eutharicus Cillica); Justin accepts that the excommunication of Acacius had been justified; end of the Acacian Schism
524 Consul II (with Venantius Opilio)
525 Death of Theodoric
526 War breaks out with the Sasanian Empire ("Iberian War")
