For a long time I have maintained a site of links to other web sites on ancient coins: "Some Educational Websites about Ancient Coins" http://augustuscoins.com/ed/sitelinks.html Today I checked it for broken links and found some and fixed the ones I could fix. There may be more broken links. (If you ever used a site of links you know that websites disappear remarkably often.) I added a couple of minor sites on coins of particular Roman emperors. I wonder if anyone can help with new addresses for these missing sites with broken links: Asia Minor Coins http://www.asiaminorcoins.com/ Sasanian coins https://www.cais-soas.com/CAIS/virtual_museum/sasanian/Artifacts/coinge.htm Trajan (Tom Buggey) This related page still works: https://tjbuggey.ancients.info/Trajan.html but says there is a new version at http://trajancoins.info/. Where is it really? It is a lot of work to keep a page of links anywhere near up to date. If you find some errors, or sites to recommend, please send me a private message. Once again, here is the page: "Some Educational Websites about Ancient Coins" http://augustuscoins.com/ed/sitelinks.html
One of the most important website for Sasanian coins (IMHO) is that of the late T.K. Mallon http://web.archive.org/web/20140209212845/http://www.grifterrec.com/coins/coins.html
In the mid-90's, I was able to keep the urls of all the ancient coin sites on the new-fangled interwebs in my head. Most were personal pages on GeoCities, Compuserve, AOL and the like. At one point there were 14 as I recall. A couple even had photos!
Asiaminorcoins is down, I think, but here's the link to it on waybackmachine: https://web.archive.org/web/20210126034310/https://www.asiaminorcoins.com/
I was disappointed to find asiaminorcoins down recently. I use the site often when trying to identify unknowns.
I added that link to the site of links. Yes. That one is under "Other cultures." I solicit recommendations for links to other educational sites. You can PM me with them.