This is a wonderful challenge! I've been thinking and thinking and thinking about how I could possibly create something for this one. I don't really have any historical themes. Well, not in their entirety. I have a pyramid, for example, but all the Egyptians that went with it were taken apart, so I could have more mid-brown heads and arms to use for modern people.
Oh, and I've got some stone-age cave people. But I can't remember who is wearing their hair nowadays.
I tried thinking of 'historical events', but most of what I vaguely remember (I was never a history student, so that's limited) isn't really suitable for a Playmobil reenactment.
But now I've got an idea! Next challenge: will it work, and look OK?
Thanks Macruran for the fun of this!