Æ15 - Caligula ΦΙΛΑΔΕΛΦΕΩΝ ΑΤΤΑΛΙΚΟϹ

Philadelphia in Lydia was one of the last Greek cities to resist Rome's administrative pressure to abandon civic coinage, and issues under Caligula represent some of the final output before the city's autonomous bronze effectively ceased. The ethnic ΦΙΛΑΔΕΛΦΕΩΝ paired with the dynastic honorific ΑΤΤΑΛΙΚΟϹ deliberately invoked the city's Attalid foundation — a claim to prestige that Philadelphia continued advertising centuries after the Pergamene kingdom had dissolved into Roman provincial order.

RPC I 3020 is among the smaller Philadelphia bronzes of the Julio-Claudian sequence.