Become a Patron of the Hermetic Library!

Ordo Templi Orientis

An unofficial, unaffiliated portal to documents, materials and books about Ordo Templi Orientis


Publications about O.T.O.

An index of foundational Ordo Templi Orientis documents with dates

Liber Number Title Date
XV 15 Ecclesiæ Gnosticæ Catholicæ Canon Missæ 1913
LII 52 Manifesto of the OTO 1919
LXXVII 77 Liber OZ 1941
CI 101 An Open Letter to those who may wish to join the Order 1919
CXXIV 124 Of Eden and the Sacred Oak pre-1919
CLXI 161 The Law of Thelema 1919
CXCIV 194 An Intimation with Reference to the Constitution of the Order 1919
CCC 300 Khabs am Pekht 1919

O.T.O. Constitution of 1906
M.M.M. Constitution of 1913
Revised O.T.O. Constitution of 1917

Elsewhere at the Hermetic Library:
Bye-laws with Reference to the Profess-Houses of the Order and its Colleges of the Holy Ghost (1914)
A Memorandum on O.T.O. Policy
Magick Without Tears, Chapter XIII: System of the O.T.O.
Confessions, Chapter 72 (Beginning with "What is Freemasonry?")
Pre-Crowley Pronunciamenti: Original translations into English of papers by Theodor Reuss and Carl Kellner.
An Account of O.T.O.: By the Chevalier de Seingalt, now revised and rewritten in the Universal Cipher.

And there is much more at the library and the Libri of Aleister Crowley


The Gnostic Mass - Liber XV

There are three versions of the Gnostic Mass that were published during Crowley's lifetime
The International (1918)
Equinox III i (1919)
Magick in Theory and Practice (1923)

And, there is additional material of interest
Liber XV, hybrid version
Annotations and Commentary at The Invisible Basilica of Sabazius

Read further about the central rite of OTO and E.G.C., the Gnostic Mass, also called Liber XV, on
THE GNOSTIC MASS: An Appreciation by A.T. Dennis
Masonic Legacy: Craft Symbolism in the Gnostic Mass by Frater S∴N∴B∴
An Analysis of the Gnostic Mass by Fr. V.I.T.R.I.O.L. & Sr. A.R.G.M.
Introduction to the Gnostic Mass by T. Apiryon

And there is much more at The Invisible Basilica of Sabazius, T Polyphilus: Vigorous Food & Divine Madness and E.G.C. Materials


Additional Reading

Read about the initial meeting of Theodor Reuss and Aleister Crowley in Magick Without Tears, Chapter 25 and The Confessions of Aleister Crowley, Chapter 72. See if you can find the IX secret Reuss accused Crowley of publishing in the Book of Lies, or Liber 333.

Read the documents in the important “Blue Equinox”, Equinox III i

Read more about OTO elsewhere on
Ordo Templi Orientis: a brief historical review By Bill Heidrick
O.T.O., M∴M∴M∴, and E.G.C. by Sabazius X



Some works on Ordo Templi Orientis which may be of interest to you are