Johann Conrad Dippel (1673-1734) was a German theologian, physician, and alchemist born at Castle Frankenstein near Darmstadt. His unconventional experiments and controversial theories have led some to speculate that he inspired Mary Shelley’s “Frankenstein.” Dippel’s time at Castle Frankenstein was marked by rumors of bizarre practices, including alchemical experiments and anatomical studies, which have contributed to his eerie reputation. (en.wikipedia.org)