Giacomo Casanova 17, in 1742, with a degree in law ("for which I felt an unconquerable aversion"). His guardian's hope was that he would become an ecclesiastical lawyer. Casanova had also studied moral philosophy, chemistry, and mathematics, and was keenly interested in medicine. ("I should have been allowed to do as I wished and become a physician, in which profession quackery is even more effective than it is in legal practice.") He frequently prescribed his own treatments for himself and friends. While attending the university, Casanova began to gamble and quickly got into debt, causing his recall to Venice by his grandmother,
Giacomo Casanova of cabalism and Freemasonry and to examine his library for forbidden books. Senator Bragadin, in total seriousness this time (being a former inquisitor himself), advised his "son" to leave immediately or face the stiffest consequences. On 26 July 1755, at age 30, Casanova was arrested for affront to religion and common decency: "The Tribunal, having taken cognizance of the grave faults committed by G. Casanova primarily in public outrages against the holy religion, their Excellencies have caused him to be arrested and imprisoned under the Leads." "The Leads" was a prison of seven cells on the top floor of the