Byzantine Empire.
The first pic is sideways; the symbol is a large letter "K", which is the Greek alphanumeral for "20", being the denomination of 20 nummi. There were 40 nummi tot he follis, thus, a half-follis.
I believe it's Year 2, which would be AD 566.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis