Hermetic Order of the Golden Dawn
The Hermetic Order of the Golden Dawn, more commonly the Golden Dawn, was a secret society devoted to the study and practice of occult Hermeticism and metaphysics during the late 19th and early 20th centuries. Known as a magical order, the Hermetic Order of the Golden Dawn was active in Great Britain and focused its practices on theurgy and spiritual development. Many present-day concepts of ritual and magic that are at the centre of contemporary traditions, such as Wicca and Thelema, were inspired by the Golden Dawn, which became one of the largest single influences on 20th-century Western occultism.
Samuel Liddell MacGregor Mathers in Egyptian costume performing a ritual in the Hermetic Order of the Golden Dawn
A secret society is an organization about which the activities, events, inner functioning, or membership are concealed. The society may or may not attempt to conceal its existence. The term usually excludes covert groups, such as intelligence agencies or guerrilla warfare insurgencies, that hide their activities and memberships but maintain a public presence.
"Secret Society Buildings at Yale College" by Alice Donlevy c. 1880. Pictured are: Psi Upsilon (Beta chapter), 120 High Street. Left center: Skull and Bones (Russell Trust Association), 64 High Street. Right center: Delta Kappa Epsilon (Phi chapter), east side of York Street, south of Elm Street. Bottom: Scroll and Key (Kingsley Trust SSS Nonse Association), 490 College Street.
The Brethren of Sincerity) were a secret society of Muslim philosophers in Basra, Iraq, in the 9th or 10th century CE.
A Hongmen seal, 19th century