- Myles Lavan
An enactment (probably an edict) of Caracalla dating to 212 or early 213 that granted Roman citizenship to all or almost all free inhabitants of the empire who did not already have it. It is so called because constitutio is the technical term for an imperial decision and Caracalla’s name was M. Aurelius Severus Antoninus.
Both Cassius Dio (78.9.5) and Ulpian (Dig. 1.5.17) record that Caracalla granted citizenship to everyone in the Roman empire. Several later texts misattribute the act to emperors of better repute. The constitution itself may survive in Greek translation as the badly damaged first text on a famous papyrus held at the University of Giessen (PGiss. 40). Following several decades of controversy, the identification is now widely accepted, though there remain several phrases in the papyrus that are hard to reconcile with this hypothesis. In any case, the lacunose text is so fraught with interpretive difficulties that it can provide little independent information about Caracalla’s grant.