Constantine IV

AncientEmperorByzantine Empire-650 — ?

Defeated the Arab siege of Constantinople.

Compare Constantine IV with another historical figure:

Quick Facts

Born

650 BCE

Country

Byzantine Empire

Era

Ancient

Occupation

Emperor

Score Overview

Military (10%)67

Political (20%)63

Influence (20%)58

Legacy (20%)52

Leadership (15%)72

Strategy (15%)67

Total Score61.2

Constantine IV — Complete Timeline

678 AD

Defeated the Arab siege of ConstantinopleWar

Constantine IV successfully defended Constantinople against a massive Arab siege that lasted from 674 to 678. The Byzantine victory, aided by the use of Greek fire, forced the Umayyad Caliphate to sue for peace and pay tribute.

Arab-Byzantine WarsSiegeGreek Fire

Impact: globalconstructive

680 AD

Reorganized the Byzantine army into themesReform◆ Major

Constantine IV continued the reorganization of the Byzantine military into thematic provinces. This system, which combined civil and military authority, proved effective in defending the empire against external threats.

Military ReformAdministrationByzantine Empire

Impact: nationalconstructive

Convened the Third Council of ConstantinopleCultural◆ Major

Constantine IV convened the Third Council of Constantinople, which condemned Monothelitism as a heresy. The council restored religious unity between Constantinople and Rome, ending a long-standing theological dispute.

Ecumenical CouncilReligious UnityByzantine Empire

Impact: regionalconstructive