Leo III the Isaurian

E410227

Byzantine emperor Christian human monarch

Leo III the Isaurian was an 8th-century Byzantine emperor best known for initiating the first phase of Byzantine Iconoclasm and stabilizing the empire against external threats.

Try in SPARQL Jump to: Surface forms Disambiguation Statements Elicitation Referenced by

All labels observed (7)

Label	Occurrences
Leo III the Isaurian canonical	17
Emperor Leo III the Isaurian	2
Leo III	2
Emperor Leo III the Isaurian (traditional attribution)	1
Leo III the Isaurian (father-in-law)	1
Leo III the Syrian	1
Leo the Isaurian	1

How this entity was disambiguated

This entity first appeared as the object of triple T3602332 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07

Target entity: Leo III the Isaurian
Context triple: [Byzantine Iconoclasm, significantPerson, Leo III the Isaurian]

A. Constantine V
Constantine V was an 8th-century Byzantine emperor known for his strong iconoclast policies, military campaigns against the Bulgars and Arabs, and significant administrative and fiscal reforms.
B. Emperor Constans II
Emperor Constans II was a 7th-century Byzantine emperor known for his long and turbulent reign marked by religious controversies, military conflicts with the Arabs, and an unusual relocation of the imperial court to Syracuse in Sicily.
C. Leo IV the Khazar
Leo IV the Khazar was a Byzantine emperor of the Isaurian dynasty who ruled in the late 8th century and continued the iconoclast policies of his predecessors.
D. Emperor Constantine IV
Emperor Constantine IV was a 7th-century Byzantine emperor known for defending Constantinople against Arab sieges and for his role in resolving the Monothelite controversy within the Christian Church.
E. Leo V the Armenian
Leo V the Armenian was a 9th-century Byzantine emperor best known for restoring and enforcing iconoclasm within the empire.
F. None of above. chosen
G. Unsure - the case is ambiguous/there is not enough information to decide.

NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07

Target entity: Leo III the Isaurian
Target entity description: Leo III the Isaurian was an 8th-century Byzantine emperor best known for initiating the first phase of Byzantine Iconoclasm and stabilizing the empire against external threats.

A. Constantine V
Constantine V was an 8th-century Byzantine emperor known for his strong iconoclast policies, military campaigns against the Bulgars and Arabs, and significant administrative and fiscal reforms.
B. Emperor Constans II
Emperor Constans II was a 7th-century Byzantine emperor known for his long and turbulent reign marked by religious controversies, military conflicts with the Arabs, and an unusual relocation of the imperial court to Syracuse in Sicily.
C. Leo IV the Khazar
Leo IV the Khazar was a Byzantine emperor of the Isaurian dynasty who ruled in the late 8th century and continued the iconoclast policies of his predecessors.
D. Emperor Constantine IV
Emperor Constantine IV was a 7th-century Byzantine emperor known for defending Constantinople against Arab sieges and for his role in resolving the Monothelite controversy within the Christian Church.
E. Leo V the Armenian
Leo V the Armenian was a 9th-century Byzantine emperor best known for restoring and enforcing iconoclasm within the empire.
F. None of above. chosen

Statements (47)

Predicate	Object
instanceOf	Byzantine emperor ⓘ Christian ⓘ human ⓘ monarch ⓘ
alsoKnownAs	Leo III ⓘ linked to: Leo III the Isaurian Leo III the Syrian ⓘ linked to: Leo III the Isaurian Leo the Isaurian ⓘ linked to: Leo III the Isaurian
birthDate	c. 685 ⓘ
birthName	Konon ⓘ
birthPlace	Germanikeia ⓘ linked to: Germanicia
birthRegion	Commagene ⓘ
capitalDuringReign	Constantinople ⓘ linked to: Constantinople (probable)
causeOfDeath	natural causes ⓘ
centuryOfActivity	8th century ⓘ
child	Anna ⓘ Constantine V ⓘ
country	Byzantine Empire ⓘ
deathDate	18 June 741 ⓘ
deathPlace	Constantinople ⓘ linked to: Constantinople (probable)
dynasty	Isaurian dynasty ⓘ
era	Middle Byzantine period ⓘ
ethnicOrigin	Syrian ⓘ
fieldOfWork	government ⓘ military leadership ⓘ religious policy ⓘ
implementedPolicy	iconoclastic policies ⓘ
issued	Ecloga ⓘ
languageOfRecord	Greek ⓘ
militaryConflict	Arab–Byzantine wars ⓘ Second Arab Siege of Constantinople ⓘ linked to: Second Arab siege of Constantinople (717–718) conflicts with the Umayyad Caliphate ⓘ
notableFor	defending Constantinople during the Second Arab Siege ⓘ founding the Isaurian dynasty ⓘ initiating Byzantine Iconoclasm ⓘ reforming Byzantine law ⓘ
opposedBy	John of Damascus ⓘ
positionHeld	Byzantine emperor ⓘ Emperor of the Romans ⓘ
predecessor	Theodosius III ⓘ linked to: Emperor Anastasius II
reignEnd	741 ⓘ
reignStart	717 ⓘ
religion	Chalcedonian Christianity ⓘ
reorganized	Byzantine themes in Asia Minor ⓘ linked to: Byzantine themes of Asia Minor
spouse	Maria ⓘ
strengthened	Byzantine frontier defenses ⓘ
successor	Constantine V ⓘ
title	Basileus Rhomaion ⓘ linked to: Emperor of the Romans

How these facts were elicited

Referenced by (25)

Full triples — surface form annotated when it differs from this entity's canonical label.

Byzantine Iconoclasm → significantPerson → Leo III the Isaurian ⓘ

Arab–Byzantine wars → opponent → Leo III the Isaurian ⓘ

Byzantine Iconoclasm → significantPerson → Leo III the Isaurian ⓘ

subject linked to: Iconoclasm

Byzantine emperors → positionHeldBy → Leo III the Isaurian ⓘ

Byzantine law → majorReformUnder → Leo III the Isaurian ⓘ

Isaurians → producedEmperor → Leo III the Isaurian ⓘ

Constantine V → father → Leo III the Isaurian ⓘ

Constantine V → predecessor → Leo III the Isaurian ⓘ

Second Arab siege of Constantinople (717–718) → commander → Leo III the Isaurian ⓘ

Second Arab siege of Constantinople (717–718) → ByzantineEmperorDuringConflict → Leo III the Isaurian ⓘ

Isaurian dynasty → hasMember → Leo III the Isaurian ⓘ

Byzantine Empire under Isaurian dynasty → hasRuler → Leo III the Isaurian ⓘ

Germanus I of Constantinople → opposedBy → Emperor Leo III the Isaurian ⓘ

subject linked to: Patriarch Germanus I of Constantinople