Leo IV the Khazar

Leo IV
Emperor of the Romans
Solidus of Leo IV and his son Constantine VI
Byzantine emperor
Reign14 September 775 –
8 September 780
Coronation6 June 751 (as co-emperor)
PredecessorConstantine V
SuccessorConstantine VI (under the regency of Irene)
Born25 January 750
Died8 September 780 (aged 30)
ConsortIrene
IssueConstantine VI
DynastyIsaurian
FatherConstantine V
MotherTzitzak

Leo IV the Khazar (Greek: Λέων ὁ Χάζαρος, romanized: Léōn ho Khazaros; 25 January 750 – 8 September 780) was Byzantine emperor from 775 to 780 AD. He was born to Emperor Constantine V and Empress Tzitzak in 750. He was elevated to co-emperor in the next year, in 751, and married to Irene of Athens in 769. When Constantine V died in September 775, while campaigning against the Bulgars, Leo IV became senior emperor. In 778 Leo raided Abbasid Syria, decisively defeating the Abbasid army outside of Germanikeia. Leo died on 8 September 780, of tuberculosis. He was succeeded by his underage son Constantine VI, with Irene serving as regent.