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Borgund Stave Church (Eduardo/CC BY-SA 2.0), pentagram, Vitruvian man, and serpent

The Viking Serpent: Serpent Worship, Sacred Geometry, and Secrets of the Celtic Church in Norway

Dan Brown wrote The Da Vinci Code, inspired by Henry Lincoln and his two co-authors’ The Holy Blood and the Holy Grail . The Norwegian researcher Harald Boehlke was inspired by the same book. Lincoln...