You have some very intriguing medieval coins here. Some of the designs look vaguely familiar but not enough for me to identify personally. The top left example with the slight bend to it appears to me to be from roughly the Viking period, though I'm not suggesting it's a Viking coin, necessarily- just from that general era. Merovingian, maybe? I don't know. I'll tag @FitzNigel, who is the first member who comes to mind that might be able to help.
Very interesting! It would probably help if you posted higher resolution photos of the coins individually... then our experts could see the legends better.
It may take me a little to figure just what they all are, but I'm suspecting Spanish for a couple - the reverse short cross with wedges and pellets strikes me as being from Barcelona, but the type was widely imitated...
I think the bottom right is Otto III also. Something like this: https://www.acsearch.info/search.html?id=2724519
Bottom left, with the coins oriented correctly (as FitzNigel sensibly did!)... Henry II, the last emperor of the Ottonian dynasty, 1002-1024, denar, possibly of the Regensburg mint. Very exciting! (And very valuable!) https://www.acsearch.info/search.html?id=567291
Those are some interesting coins. They would be a blast to research. I think a couple may be German and maybe a couple eastern Europe. Probably 11th Century or there abouts. Just layman's guesses though.
Good catch! I'm struggling with the others, but also not putting a whole lot of effort in (German Coins interest me, but I haven't delved deep into them...)
