Cagliostro. A famous Adept, whose real name is claimed (by his enemies) to have been Joseph Balsamo. He was a native of Palermo, and studied under some mysterious foreigner of whom little has been ascertained. His accepted history is too well known to need repetition, and his real history has never been told. His fate was that of every human being who proves that he knows more than do his fellow- creatures; he was “stoned to death” by persecutions, lies, and infamous accusations, and yet he was the friend and adviser of the highest and mightiest of every land he visited. He was finally tried and sentenced in Rome as a heretic, and was said to have died during his confinement in a State prison. (See “ Mesmer”.) Yet his end was not utterly undeserved, as he had been untrue to his vows in some respects, had fallen from his state of chastity and yielded to ambition and selfishness.
Source: H.P.Blavatsky - The Theosophical Glossary