Secret Societies of the Middle Ages is a book written by Thomas Keightley that explores the history and practices of various secretive groups that existed during the Middle Ages. The book delves into the beliefs, rituals, and symbols of these societies, including the Knights Templar, the Assassins, and the Rosicrucians. Keightley provides a detailed account of the origins and activities of each group, as well as their impact on the political and social...