as it can be used to track down ore sources from the eastern parts of the classical world. Use of brass gradually spread towards west. Mints There were mints in the cities of Amisos, Pharnaceia, Trapezus and Sinope. At the time of Mithridates VI the number of cities minting coins drastically increased. Cities such as Amaseia, Abonutheichos, Cabeira, Chabakta, Comana, Gaziura, Laodikeia and Taulara. Only Gaziura, of these cities, had minted coins in the past. See also Coinage of Side Achaemenid coinage Bithynian coinage Ptolemaic coinage Seleucid coinage References External links Ancient currencies Kingdom of Pontus