Before youtube started banning "hate speech" there were a lot of documentaries calling this out. One of them was a guy going through Europe and pointing out the crazy stuff you just take at face value. I think it was in Geneva or somewhere expensive, but there's buildings upon buildings owned by these cults with all kinds of ancient symbols on them. It's a shame I don't have those videos, it was rather shocking seeing all of it while this guy was explaining what each symbol meant.