Bosporan era

[4] The Bithyno-Pontic era fell out of use in northern Asia Minor following the Roman conquest in 63 BC.

Rather, the local authorities preferred to adopt new eras commemorating their joining the Roman province of Bithynia et Pontus.

Inscriptions, however, survive from the northern shore of the Black Sea, the region that fell under the Bosporan Kingdom in the first four centuries AD.

The first Bosporan coins bearing the era are from the reign of Mithridates VI's son, Pharnaces II, who never controlled Pontus and whose kingdom was thus restricted to the Cimmerian Bosporus.

[2] The earliest inscription dated with the Bosporan era can be read either 325 BE (AD 29) or else 313 (17) and mentions the reigning king, Aspurgus.