Weiss, Claude J. (1941-)

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Weiss, Claude J. (1941-)

Claude J. Weiss, a prominent Swiss astrologer, was born on May 6, 1941, in Basel, Switzerland. He attended the Swiss Institute of Technology, where he earned an engineering degree with a specialization in agronomy. He later spent two years in India, and during his stay, in 1967, was introduced to astrology. He studied astrology over the next decade and became a full-time professional in 1977. The following year he created Astrodata, a calculation and interpretation service for astrological delineations that is now the largest in Continental Europe. He continues to serve as its president.

Weiss has emerged as one of the leading European voices calling for the psychological interpretation of astrology, and he has been a particular devotee of transactional analysis and Jungian psychology. He has emphasized the role of free will and individual choice in light of the insights of astrology. He authored a widely used two-volume work on horoscope interpretation and a specialized study of the effects of the planet Pluto.

Through the 1980s and 1990s, Weiss became a dominant voice in the German-speaking astrological community. He is a popular lecturer, has written a number of books, and edits a periodical, Astrologie Heute. He has helped organize four world astrological congresses and has served as president of the Swiss Astrological Association. He has also become known as a master of mundane astrology, the astrology that deals with the larger political fates of people and nations. His office is in Wettswil, near Zürich.


Weiss, Claude J. Astrologie: Eine Wissenschaft von Raum und Zeit. Wettswil, Switzerland: The Author, 1967.

. Horoskopanalyse. 2 vols. Wettswil, Switzerland: Edition Astrodata, 1992.

, and Verena Bachmann. Pluto: Das Eritische und Dämonische. Wettswil, Switzerland: Edition Astrodata, 1991.