Was the event La Purga real or not. And what does the illuminati have to do with it? Did it even exist?

I just the saw the movie Angels and Demons and I am wondering- was the illuminati real? was there really a secret society that went up against the Catholics right under their nose? What was La Purga? I want to know if that was a real event that really happened or is it just a figment of Dan Browns imagination?... show more I just the saw the movie Angels and Demons and I am wondering- was the illuminati real? was there really a secret society that went up against the Catholics right under their nose? What was La Purga? I want to know if that was a real event that really happened or is it just a figment of Dan Browns imagination? Please answer.