For those who might be interested, bronze coins of Constantine the Great are easily available for only a few dollars. You can get a nice one with easily readable legends for less than $10. Only trick is to get the real, original Constantine II, instead of his kidsConstantine JR, Constans, Constantius II. But any of them are over 1600 years old and with some of his kids, you might see signs of Christianity on the coinsthe Chi Rho.