Constantinian bronzes

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An AE3 coin of Valens.
"AE3" and "AE4" redirect here. For the Czechoslovakian aircraft, see Aero Ae 03 and Aero Ae 04.

The Constantinian bronzes were a series of bronze coins introduced in the Roman empire in the middle of the 4th century. The specific denominations are unclear and debated by historians and numismatists. They are referred to as AE1, AE2, AE3 and AE4, with the former being the largest (near 27 mm) and the latter the smallest (averaging 15 mm) in diameter. Namely:

AE1 AE2 AE3 AE4
over 25 mm 21 – 25 mm 17 – 21 mm under 17 mm

See also[edit]