 One of Panizza's notable presentations was a lecture in 1891 titled "Genie und Wahnsinn" (Genius and Madness), which drew heavily on the work of Cesare Lombroso.Of particular interest even today are Panizza's discussions of hallucinations and model psychosis, hashish and the hallucinatory basis of religion.With the publication in 1893 of "Die unbefleckte Empfängnis der Päpste" (The Immaculate Conception of the Popes), Panizza embarked on a path of militant anti-Catholicism.