# Edict of Thessalonica (380)

URL: https://roman-history.com/timeline/380-edict-of-thessalonica
Location: Thessalonica and Constantinople
Categories: politics

Theodosius I and his colleagues endorsed Nicene Christianity as the imperial standard.

## Why it matters
The edict accelerated the Christianization of Roman public institutions.

Ruler at the time: [Theodosius I](https://roman-history.com/rulers/theodosius-i)