I've a BA in Sociology, but my minor was in history.

I believe I did a pic a few years ago (before I changed my style to what I have now) that about a half dozen characters in it. However, they where almost all generic filler characters as the pic was intended to be a visual comparison of different AKs, and most of the characters were hidden behind a wall if I remember correctly. Otherwise, three or four isn't unheard of.