78 cards as some have more than one representation.
One of our two favorite modern decks.
The Thoth Tarot is a divinatory tarot deck painted by Lady Frieda Harris according to instructions from Aleister Crowley. Crowley referred to this deck as The Book of Thoth, and also wrote a 1944 book of that title intended for use with the deck.
Crowley originally intended the Thoth deck to be a six-month project aimed at updating the traditional pictorial symbolism of the tarot. However, due to increased scope the project eventually spanned five years, between 1938 and 1943 and both artists died before publication in 1969 by Ordo Templi Orientis.
Crowley renamed several of the trumps compared to earlier arrangements, and also re-arranged the numerical, astrological and Hebrew alphabet correspondences of 4 trumps compared to the Rider-Waite tarot deck in accordance with Tarot of Marseilles, his book Liber AL vel Legis (The Book of the Law) and its New Commentary.
In the New Commentary and Book of Thoth Crowley demonstrates that his trump arrangement forms a double loop in the zodiac-number and letter-number correspondences compared to the Rider-Waite tarot deck where there is no loop. There are interpretations as to why The Thoth Tarot deck does not follow Crowley's new arrangement having only a letter-number double loop and one of them is that it follows the same Golden Dawn arrangement as the Rider-Waite tarot deck.
All these old letters of my Book are aright; but צ is not the Star. (AL I:57)
Tzaddi is the letter of The Emperor, the Trump IV, and He is the Star, the Trump XVII. Aquarius and Aries are therefore counterchanged, revolving on the pivot of Pisces, just as, in the Trumps VIII and XI, Leo and Libra do about Virgo. This last revelation makes our Tarot attributions sublimely, perfectly, flawlessly symmetrical. (AL I:57 New Commentary)
For The Star is referred to Aquarius in the Zodiac, and The Emperor to Aries. Now Aries and Aquarius are on each side of Pisces, just as Leo and Libra are on each side of Virgo; that is to say, the correction in the Book of the Law gives a perfect symmetry in the zodiacal attribution, just as if a loop were formed at one end of the ellipse to correspond exactly with the existing loop at the other end. (Book of Thoth pg. 10)
Harris' renditions of the tarot are on watercolor paper affixed to a thick backing; the acidity of the backing, according to a report from 2006, resulted in discoloration of borders, and to some extent, the paintings themselves. The paintings also required cleaning and the repair of small tears. A conservation plan called for the cleaning surfaces, the removal of backing (while retaining original inscriptions), reuse of the hand-painted window mats, and replacement of overlays with acid-free, museum-quality paper. The project was completed in 2011. The paintings are owned by the Warburg Institute; work was completed by the Institute's in-house specialist, Susan Campion. Various O.T.O-related donations and fundraising efforts covered the $53,000 in restoration costs, with major contributions from publisher and O.T.O. member Christopher Hyatt.