If I'm running an excavator at a construction site and I dig up a relic like this, do I get to keep it? Do all items of a certain historical significance immediately get confiscated by a government body?
There are some things that are ancient but common so you can keep, like Roman or Byzantine coins, but even then, you should bring it under for review so they can either pay you the value of it and hold on to it, or give you back with confirmation saying it’s not rare and OK to keep as a keepsake.