Ordo Templi Orientis (O.T.O.) can be translated as Order of Oriental Templars, or Order of the Temple of the East. It is a secret, fraternal organization similar to that of Freemasonry, with a series of graded initations. For its teachings and principles of organization, it has accepted the Law of Thelema, which is expressed as “Do what thou wilt.” Thelemites believe that this Law was established with the writing of the Book of the Law by Aleister Crowley in 1904 in Cairo, Egypt.