Five mintmarks, one city.
Hint: Do you recognize the city with this mintmark? (For images of the complete coins and the story, there is a link at the bottom of this page.)
It is a Byzantine mint city.
How about this one?
Here is an unusual variant:
Okay. Now let's spell it out, bit by bit:
or
θV ΠO Λ[I]S
Is this helpful?
Now, in Latin: