Radiate (coin)

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Radiate of Gallienus, discovered in the Vale of Glamorgan.

The radiate or Post-reform radiate (the Latin name, like many Roman coins of this time, is unknown), was a Roman coin introduced by Diocletian during his reforms. The radiate looked very similar to the Antoninianus, with a radiate crown like Sol Invictus, apart from the absence of the "XXI" marking that numismatists believe indicated that the coin contained 20 parts bronze to 1 part silver. The radiate had little or no silver content. The weight varies between 2.23[1] and 3.44 grams.[2]

On known radiates there is only one image: Jupiter presents Victory on a globe to Diocletian (Wildwinds[3]), with the mintmark between the human images[4]

There are also known radiates of Maximian, Constantius I, and Galerius, Diocletian's co-rulers, in the same style.