Nearly all modern ceremonial practice, and a great deal of modern witchcraft that does not describe itself as ceremonial at all, descends from one short-lived London society.
The Hermetic Order of the Golden Dawn was founded in 1888 on the strength of a cipher manuscript and a supposed German adept who is now generally accepted to have been a fiction. What it produced regardless was a curriculum of extraordinary coherence: a graded system of initiations mapped to the sephiroth of the Tree of Life; the Lesser Banishing Ritual of the Pentagram and the Middle Pillar, which remain the standard opening exercises of the whole field; the Hexagram rituals for planetary work; a complete set of tarot, astrological, elemental, angelic and Enochian correspondences; and a method of visionary work called scrying in the spirit vision. Its membership included W. B. Yeats, Arthur Edward Waite and, briefly and disruptively, Aleister Crowley.
It collapsed within about a decade in a series of quarrels and schisms. Its material survived because Israel Regardie published the order's papers in the late 1930s, over the objection of surviving members, on the ground that the system was too valuable to be lost with its keepers.
Crowley took the system, added the material of his own reception in Cairo in 1904, and built Thelema around the axiom that every person has a true will and that the work is to discover and do it. His Liber 777 tabulated the correspondences, and his order structures carried the method into the twentieth century.
Two later developments are worth noting. Wicca, as constructed by Gerald Gardner in the 1950s, took circle-casting, the elemental quarters, the tools and much of the ritual grammar directly from this source. And chaos magic, from the 1970s, kept the sigil technique while discarding the metaphysics, treating belief itself as the variable to be manipulated.