Ancient Greek Medallion Coin Necklace - Nike & Bird with SnakeGrecian Medallions mythology, history and symbolism. These medallions were cast from ancient coins into solid bronze using a lost wax casting method. The imagery on the coins represent different meanings. The goddess on the front is NIKE who represents victory. It's also where NIKE, the giant sports company got their company name from. A bird with a snake in its mouth is on the other side of the coin. This was a symbol used to let people know the