Constantine the Great and sons (330-346 AD)

Coin Description Commemorative Coin, AE 18mm, Grade??, The coin is well centered but has a very fragile patina most of which is gone I carefully worked around the remaining pieces, it is a real shame cause the details that are left show an absolute beautiful coin with great detail. VM 1, RBC 363, RIC VII Siscia 241.
Obverse The portrait is of the personification of the city of Constantinopolis a helmeted bust facing left with a scepter (denoting power) over her shoulder. The legend reads CONSTANTINOPOLI  meaning "Constantine's city".
Reverse

The reverse shows Victory standing on the prow of a galley facing left, holding a spear in her right and resting her left hand on a shield. It commemorates a great naval battle waged between Constantine I and Licinius I his then co-emperor and rival. Constantine won the battle securing the site of his new capital.

Mint The exergue reads ASIS meaning: A the first officina alpha of the Siscia mint.
The Entire Story Constantine the Great refounded the ancient Greek city of Byzantium as Constantinople and made it the capital of the empire. On the 8th of November 324 Constantine formally laid out the boundaries of his new city, roughly quadrupling its territory. By 328 the new walls were completed, and on the 11th of May 330 the new city was formally dedicated. This coin was minted to commemorate this grand occasion.