Roman Legionary Diploma - Diplomata Militaria - Very Rare Roman Artefact From Antalya Museum Turkey

A Roman military diploma was a document inscribed in bronze certifying that the holder was honourably discharged from the Roman armed forces and/or had received the grant of Roman citizenship from the emperor as reward for service.

The diploma was a notarised copy of an original constitutio (decree) issued by the emperor in Rome, listing by regiment (or unit) the eligible veterans. The constitutio, recorded on a large bronze plate, was lodged in the military archive at Rome (none such has been found; presumably they were melted down in later times).