Papirius was the first known Pontifex Maximus of the Roman Republic, dating to 509 BC. He is credited with a collection of Roman laws known as the Ius Papirianum or Ius Civile Papirianum, which ancient sources regarded as leges regiae, laws from the Regal period. His praenomen is given variously as Gaius, Sextus, or Publius.
- ^ Arnaldo Momigliano, "The Origins of Rome," Cambridge Ancient History: The Rise of Rome to 220 B.C. (Cambridge University Press, 1989, 2002), vol. 7, pt. 2, p. 107.