"The letters O.T.O. stand for Ordo Templi Orientis, the Order of Oriental Templars, or Order of the Temple of the East. O.T.O. is dedicated to the high purpose of securing the Liberty of the Individual and his or her advancement in Light, Wisdom, Understanding, Knowledge, and Power through Beauty, Courage, and Wit, on the Foundation of Universal Brotherhood.

Ordo Templi Orientis is the first of the great Old Æon orders to accept The Book of the Law, received by Aleister Crowley in 1904 EV. This book proclaims a New Æon in human thought, culture and religion. The Æon arises from a single supreme injunction: the Law of Thelema, which is Do what thou wilt.

Ordo Templi Orientis has two constituent rites, Mysteria Mystica Maxima and Ecclesia Gnostica Catholica.

  • Mysteria Mystica Maxima (M∴M∴M∴) is the initiatory arm of O.T.O.
  • Ecclesia Gnostica Catholica (E.G.C.), the Gnostic Catholic Church, is the ecclesiastical arm of O.T.O. It confers sacraments including the eucharist of the Gnostic Mass, baptism, confirmation, and ordination."
- quoted from US Grand Lodge O.T.O.

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"I got my A∴A∴ grade ... and that too, exactly at the time prophesied ... I must do my duty ... and that is to preach my Law. Therefore this is the Word of Baphomet to all the members of the O.T.O.: THELEMA ... One must take some very simple, very deep word which cuts at the heart of things ... I say THELEMA. Go on, therefore, preaching this and nothimg else in season and out of season. You won't have to wait long for results."
- A. Crowley to Charles S. Jones, Oct. 4th, 1915 e.v.

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There are many individual O.T.O. organizations and groups that operate outside of the formal and legal jurisdiction of the Californian nonprofit religious corporation which also holds the exclusive copyright for the name Ordo Templi Orientis.

Ordo Templi Orientis, O.T.O., and the O.T.O. Lamen design are registered trademarks of said corporation, Ordo Templi Orientis.

Text and videos above and links below are sharing info about this most popular organization (also known as 'Caliphate O.T.O.').
There are many other organizations and groups, of course, disseminating the spiritual current of Thelema according to their Will: B.O.T.O., O.T.O.A., Typhonian O.T.O., S.O.T.O., O.T.O.F., Ordo Templi Occultis etc.

Much like in the case of various A.'.A.'. groups, in reality there is no 'One True Lineage' or 'One True Teacher' above all others - aspirants and magicians from all over the world are freely following inner Will beyond temporal human organizations/corporations and personal projections on the Thelemic spiritual current, for:

"There is no law beyond Do what thou wilt." Liber AL III-60

Texts and links of interest:

  • O.T.O. around the world, a list of countries where most popular and known version of the O.T.O. is present. (a new page opens up)
  • Basic O.T.O. Information — An off-site list of basic info on Ordo Templi Orientis for self-study (Thelemic Unity) (a new page opens up)