According to theHistoria Augusta,Firmus (died 273) was ausurper of Syrian origin during the reign ofAurelian.^[1] The contradictory accounts of his life and the man himself are considered to be a complete fabrication, perhaps based on the laterFirmus.^[2]

According to theHistoria Augusta ("Firmus"), Firmus was a man of great wealth. He had his house fitted with square panels of glass, and owned a huge library. His commercial relationships involvedBlemmyes,Saracens, and India. He had two elephant tusks, which later Aurelian projected to use as a basis for a statue toJupiter and which were actually given as a present byCarinus. Physically, Firmus was noteworthy, being huge and very strong. Firmus was notably also a heavy drinker and could eat quite a bit. TheHistoria Augusta states that he once consumed an entire ostrich in one day, and even beat one of Aurelian's standard bearers and notorious drinkers in a drinking contest, draining two buckets of wine while remaining completely sober. The importance and threat of Firmus' revolt is related to the interruption of the Egyptian grain supply to Rome.

• "Firmus Saturninus Proclus et Bonosus" 3-6,Historia Augusta
• "Aurelianus" xxxii.2‑3,Historia Augusta
• Zosimus i.61.1

• "Firmus", s.v."Aurelian",De Imperatoribus Romanis site

• 273 deaths
• 3rd-century Roman usurpers
• Asian people whose existence is disputed

• CS1 French-language sources (fr)
• Articles with short description
• Short description matches Wikidata
• Articles with hCards
• Year of birth unknown