The changing iconography of Byzantine gold coinage
numismatics.org
numismatics.org
One of my favorite things about the Byzantine solidi is that, although there are some great (and expensive) rarities among the ones mentioned in the article, they are in general readily available and readily affordable for a nearly 2000-year old archeological artifact.
The more "common" varieties can be had for not a serious premium over their gold value....around +/- $1000 or so.
[1] https://en.wikipedia.org/wiki/Heraclius#Byzantine_counter-of... [2] https://en.wikipedia.org/wiki/Battle_of_the_Yarmuk [3] https://en.wikipedia.org/wiki/Battle_of_Manzikert
I'm biased because I specialize in 18th/19th century US stuff, but I think those were the best-looking (overall - not necessarily just the designs themselves).
Dies were made by starting with an actual-sized engraved positive which was used to make the working dies (negatives), which were then polished to make the coins (positives). You get cool errors and varieties from slight differences in dies (that crack and break over time) and things like hand-punched dates (why re-engrave a whole new master when you can just take the main design with a blank date, create a die, and smack in the "1895" with a hammer? :)
I think the modern modern laser-engraved stuff has lost something...the coins of today are almost "too good" - they're kinda flat-looking & soft. shrug
https://coins.ha.com/itm/byzantine/ancient-coins/ancients-me...
Sold for $216,000 because it's both the nicest known and there are only 7 known from Emperor Mezezius.
So the incentive to fake is high, but because there are only 7 to compare it to, experts would be able to spot the attributes of a fake pretty easily (even the best fakes always have some tell-tale giveaways).
If you want to read a super cool story about a modern counterfeiter, Google around for the story of "Omega Man", a contemporary counterfeiter who created fakes of some early 1900s gold coins that were SO good that people actually seek out and collect the counterfeits today (he, like many con masters, couldn't resist an ego spike and left a calling card on his fakes...)
Quite likely due to Islamic aniconism: https://en.wikipedia.org/wiki/Aniconism_in_Islam
An interesting podcast about Byzantium that picks up where Mike Duncan's History of Rome left off