25 biggest secret societies to ever exist

Secret societies are typically groups whose rituals and activities are hidden away from non-members. Since the time of the crusades, hundreds of secret societies have been formed from different parts of the world to serve diverse political, social and religious purposes. Here is a list of the 25 biggest secret societies to ever exist as well as a glimpse at the conspiracy theories associated with them. While some of them are believed to be fictitious or have already been dissolved, traces of their existence or their legend remain apparent even until today.