According to the Historia Augusta, Firmus was a usurper of Egyptian origin during the reign of Aurelian. The apparently contradictory accounts of his life and the man himself are considered by some historians to be a complete fabrication, perhaps based on the later Firmus.
- Occupation
- monarch
- Position held
- Roman emperor
- Citizenship
- Ancient Rome
- Born
- 201
- Died
- 273
