That you think the concept is fascinating is blowing me away @Deacon Ray! That is great motivation! Thank you.
Yes, the Achaemenids are important for Jewish history and the history of religious freedom. Cyrus the Great ended the Babylonian Exile of the Jewish people and let them return to their homeland. He is also remembered for the Cyrus Cylinder, a document that includes what may be the earliest known declaration of religious tolerance (though this interpretation is disputed by some): https://en.wikipedia.org/wiki/Cyrus_Cylinder I was fortunate enough to see the Cyrus Cylinder when it toured the US in 2013 (I saw it in San Francisco), quite a moving artifact. The Parthian kingdom was also religiously tolerant, the Parthians don't seem to have tried to enforce their own religion on any of the groups they conquered. There was a large Jewish settlement in Parthian Mesopotamia, and parts of the Babylonian Talmud were written there at this time, although the final compilation of them didn't happen until the Sasanian period. (The Sasanians were a lot less tolerant, religions other than Zoroastrian were often persecuted.) So you might want to seek out a few Parthian coins (you already have one that I know of )- fortunately there are lots of types to choose from, some are very common and fairly inexpensive.
Thank you, @Parthicus, for this information and link about that cylinder. I learned a bunch and will read more. (I never knew a cylinder also has sides referred to as “obverse and reverse” until I saw the caption under the photograph in that wiki article.) And, yes, the little Parthian coin also intrigued me, as I recall. I really like that coin and will be extremely pleased if it has a place in this idea I have for my collection. Yaaay, Parthicus! Thank you again!
I totally agree => this bunch is amazing and deserves a big hand for being so fricken awesome!! (cheers)