Societas Rosicruciana in Anglia in the context of William Robert Woodman

Samuel Liddell (or Liddel) MacGregor Mathers (8 January 1854 – 5 or 20 November 1918), born Samuel Liddell Mathers, was a British occultist and member of the S.R.I.A. He is primarily known as one of the three founders of the Hermetic Order of the Golden Dawn, a ceremonial magic order of which offshoots still exist. He became so synonymous with the order that Golden Dawn scholar Israel Regardie observed in retrospect that "the Golden Dawn was MacGregor Mathers."

The Hermetic Order of the Golden Dawn (Latin: Ordo Hermeticus Aurorae Aureae), more commonly the Golden Dawn (Aurora Aurea), was a secret society from the Western esoteric tradition, that was heavily based on Rosicrucianism and inspired by Freemasonry, chiefly 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.

The three founders, William Robert Woodman, William Wynn Westcott, and Samuel Liddell Mathers, were Freemasons and members of the Societas Rosicruciana in Anglia. Westcott appears to have been the initial driving force behind the establishment of the Golden Dawn. Hence the Golden Dawn system was based on hierarchy and initiation, similar to Masonic lodges. While the grade structure was based on the SRIA, women were admitted on an equal basis with men.

Hermetic Qabalah (from Hebrew קַבָּלָה (qabalah) 'reception, accounting') is a Western esoteric tradition involving mysticism and the occult. It is the underlying philosophy and framework for magical societies such as the Hermetic Order of the Golden Dawn, has inspired esoteric Christian organizations such as the Societas Rosicruciana in Anglia, is a key element within the Thelemic orders, and is important to mystical-religious societies such as the Builders of the Adytum and the Fellowship of the Rosy Cross.

Hermetic Qabalah arose from Christian Cabala, which itself was derived from Jewish Kabbalah, during the European Renaissance, becoming variously Esoteric Christian, non-Christian, or anti-Christian across its different schools in the modern era. It draws on a great many influences, most notably: Jewish Kabbalah, Western astrology, Alchemy, Pagan religions, especially Egyptian and Greco-Roman, Neoplatonism, Hermeticism, and the symbolism of the tarot. Hermetic Qabalah differs from the Jewish form in being a more syncretic system; however, it shares many concepts with Jewish Kabbalah.

Rosicrucianism (/ˌroʊzɪˈkruːʃəˌnɪzəm, ˌrɒzɪ-/) is a spiritual and cultural movement influenced by Esoteric Christianity and Hermeticism that arose in early modern Europe in the early 17th century after the publication of several texts announcing to the world a new secret society. Rosicrucianism is symbolized by the Rose Cross or Rosy Cross. There have been several Rosicrucian (or Rosicrucian-inspired) organizations since the initial movement was founded, including the Order of the Golden and Rosy Cross (1750s–1790s), the Societas Rosicruciana in Anglia (1865–present), and the Hermetic Order of the Golden Dawn (1887–1903).

The Chymical Wedding of Christian Rosenkreutz (German: Chymische Hochzeit Christiani Rosencreutz anno 1459) is a German book edited in 1616 in Strasbourg. Its anonymous authorship is attributed to Johann Valentin Andreae. The Chymical Wedding is often described as the third of the original manifestos of the mysterious "Fraternity of the Rose Cross" (Rosicrucians), although it is markedly different from the Fama Fraternitatis and Confessio Fraternitatis in style and in subject matter.

As one of the three foundational Rosicrucian Manifestos, the book also inspired several Rosicrucian organizations such as Order of the Golden and Rosy Cross (1750s–1790s) and Societas Rosicruciana in Anglia (1865–present).

Arthur Edward Waite (2 October 1857 – 19 May 1942) was a British poet and scholarly mystic who wrote extensively on the occult and Western esotericism. He was the co-creator of the Rider–Waite Tarot (also called the Rider–Waite–Smith or Waite–Smith deck). As his biographer R. A. Gilbert described him, "Waite's name has survived because he was the first to attempt a systematic study of the history of Western occultism—viewed as a spiritual tradition rather than as aspects of protoscience or as the pathology of religion."

He was a Freemason, as well as being a member of the Societas Rosicruciana in Anglia and the Hermetic Order of the Golden Dawn.