on the front side of the coins, he is seen with a cap. on the other side, a fire altar is shown. the altar has writing around it. farn-sasan is the only king that is known to have a fire altar on coins that is also from sakastan. around the same time, ardashir i () made coins with a fire-altar that looked like farn-sasan's coins. historians are not sure if farn-sasan copied the fire altar or if ardashir i copied the fire altar off of farn-sasan.