Maybe a reference would help - I'm not sure how this is a meaningful statement. It seems that there could be many somewhat "generic" Western European jokes abo

Maybe a reference would help - I'm not sure how this is a meaningful statement. It seems that there could be many somewhat "generic" Western European jokes about despots which date back to Roman times. But without more information I can't think of any jokes at or about Hitler specifically that could possibly date back to the Romans.