I have recently realised how little I know about some of the historical occult organisations and figures, so I thought it might be interesting to do some research and share it. The Hermetic Order of the Golden Dawn seemed like a logical place to start.
The Golden Dawn was a hugely influential society, which informed much magical workings today, and inspired many other traditions such as Wicca or Chaos Magic.
In1800 interest in occultism in Europe spiked, with people seeking more exciting spiritual systems than orthodox religions of the time. Spiritualism was gaining momentum after being created in 1848, while Eliphas Levi was revising occult studies in France in 1950, and the Theosophical Society was opened in 1975 in New York
The Golden Dawn was founded by three Freemasons (Samuel Mathers, William Woodman and William Westcott) in 1887, after they received and decoded the Cipher Manuscripts, which contained information on Hermetic magic, alchemy, Qabalah, astrology, and tarot. There are some doubts over the authenticity of the manuscripts, as some of the information they contained was not put forward until after 1809- date of their supposed creation. The manuscripts contained an address to Fräulein Sprengel, who was contacted by Westcott to obtain information on starting the Golden Dawn in England based on the organisations based in Germany. Some believe that there was indeed a German Rosicrucian order with an existing branch in London, others believe Golden Dawn was born from a Jewish organisation called Lodge of the Rising Dawn, yet others believe that the manuscripts were fabricated along with their back story. Either way, the manuscripts formed the basis for the first five initiation rituals.
The Golden Dawn teachings included ceremonial magic, symbolism, divination systems such as tarot, geomancy and scrying, astral travel, sigils, Enochian magic, Greek mysticism, Egyptian mysticism, Qabalah, angels, astrology, and more.

The Complete Rose Cross, developed by the Hermetic Order of the Golden Dawn. Its design includes the Three Alchemical Principles, the four elements and spirit, pentacles, hexagram, 22 petals for Hebrew letter and paths on the Tree of Life, and rays of Divine light.
In 1888 the first temple Isis-Urania was opened, with more temples following in the years shortly after. Around 1891 Mathers finalised the Second Order – the Order of the Rose of Ruby and the Cross of Gold. This order was much more practical with rigorous examination and focus on magical skills, rather than philosophical teachings. More temples opened in America in late 1910s.
Trouble began when Annie Horniman, main financier of the Order, accused Mathers of focusing too much on politics rather than the organisation, and he in turn accusing her of weakening his authority. This eventually resulted in Horniman withdrawing her financial support and later being expelled from the organisation. In1987 Westcott was forced to resign as his involvement in the order became known to the authorities. His position was taken up by Florence Farr, who was beginning to tire of Mathers and suggested the Golden Dawn is dissolved. Mathers believed this was a move to replace him with Westcott, so he revealed to Farr that the letter from Fräulein Sprengel were forged by Westcott, which was a huge blow to the London members and their trust in the organisation. Later trouble with Aleister Crowley’s initiation into the second order further deepened the rift between Mathers and the London members. Eventually Mathers and Crowley were expelled, but chaos and confusion ensued, with the name of the organisation being further tarnished by Mr. and Mrs. Horos, who were a couple of fraudsters, exploiting members financially and sexually. Mr Horos was arrested for rape, but because they claimed to be leaders of the Golden Dawn, many of the secrets of the organisation were made public. Following this fiasco, the London order changed its name to Hermetic Order of the Morgenrothe, while Mathers re-named his Second Order as Alpha et Omega. The orders and their variants continued to operate under different names with different focus points with varying success until 1970s. Since then, new versions of the Golden Dawn organisations have attempted to revive the teachings and rituals.
