Æ20 - Caracalla ΘΥΑΤΕΙΡΗΝΩΝ

Thyatira, a Lydian city of considerable commercial importance, was one of the most prolific issuers of provincial bronze under the Severan dynasty. Its coins circulated locally alongside Roman imperial currency, filling denominations Rome had little interest in supplying to the eastern provinces directly. Caracalla's reign saw a sharp expansion of such civic issues across the conventus of Pergamum — partly a byproduct of the Constitutio Antoniniana of 212 AD, which extended citizenship to nearly all free inhabitants of the empire and created new civic pressures to affirm local identity through coinage.