Cunctos Populos
The Edict of Thessalonika, also known as Cunctos populos, orders all subjects of the Roman Empire to profess the faith of the bishops of Rome and Alexandria, making Nicene Christianity the state religion of the Roman Empire
Permanent historical records · Updated 2026-11-03
380 in Roman Empire
Explore 10 historical events and records for Roman Empire in 380.
Historical records for Roman Empire in 380
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February
Edict of Thessalonika
The Edict is issued after Theodosius had been baptized by the Bishop Ascholius of Thessalonica upon suffering a severe illness in Thessalonica
Edict of Thessalonika
The Edict of Thessalonica (also known as Cunctos populos) isissued by the three reigning Roman Emperors, making Nicene Christianity the state religion of the Roman Empire
Edict of Thessalonika
The Edict of Thessalonika is issued under the influence of Acholius, and thus of Pope Damasus I, who had appointed him to affirm a single expression of the Apostolic Faith as legitimate in the Roman Empire, "catholic" (that is, universal) and "orthodox" (that is, correct in teaching)
Edict of Thessalonika
Theodosius attempts to suppress all non-Nicene forms of Christianity, especially Arianism, to establish Nicene orthodoxy
Edict of Thessalonika
The Edict of Thessalonika is jointly issued by Theodosius I, Gratian, and Valentinian II
Edict of Thessalonika
The Edict of Thessalonika, also known as Cunctos populos, orders all subjects of the Roman Empire to profess the faith of the bishops of Rome and Alexandria, making Nicene Christianity the state religion of the Roman Empire
Nicene Christianity
The Edict of Thessalonica (also known as Cunctos populos) isissued by the three reigning Roman Emperors, making Nicene Christianity the state religion of the Roman Empire
Nicene Christianity
The Edict of Thessalonika, also known as Cunctos populos, orders all subjects of the Roman Empire to profess the faith of the bishops of Rome and Alexandria, making Nicene Christianity the state religion of the Roman Empire
Other events (month unknown)
Ambrose Defends Nicene Faith
Ambrose became a leading defender of Nicene Christianity against Arian theological positions.
How these records were prepared
Generated from the World History Database historical_events table. Identical display records are collapsed; descriptions otherwise retain the stored text. Coverage and source quality vary. Check primary and specialist sources before citing individual historical claims.