Wouter J. Hanegraaff is Professor of History of Hermetic Philosophy and Related Currents at the University of Amsterdam, The Netherlands. He has published extensively on modern and contemporary Western esotericism, including a book devoted to the 15th-century Christian Hermetist Lodovico Lazzarelli and a monograph on the New Age movement.

Antoine Faivre is Professor Emeritus of History of Esoteric and Mystical Currents in Modern and Contemporary Europe at the 5th section of the École Pratique des Hautes Études (Sorbonne), Paris, France.

Roelof van den Broek is Professor Emeritus of History of Christianity at the University of Utrecht, The Netherlands.

Jean-Pierre Brach is Professor of History of Esoteric Currents in Modern and Contemporary Europe at the 5th section of the École Pratique des Hautes Études (Sorbonne), Paris, France.

This is the first comprehensive reference work to cover the entire domain of “Gnosis and Western Esotericism” from the period of Late Antiquity to the present. Containing around 400 articles by over 180 international specialists, it provides critical overviews discussing the nature and historical development of all its important currents and manifestations, from Gnosticism and Hermetism to Astrology, Alchemy and Magic, from the Hermetic Tradition of the Renaissance to Rosicrucianism and Christian Theosophy, and from Freemasonry and Illuminism to 19th-century Occultism and the contemporary New Age movement. Furthermore it contains articles about the life and work of all the major personalities in the history of Gnosis and Western Esotericism, discussing their ideas, significance, and historical influence.