"Arezzo, November 15 - Italian paranormal-phenomena experts have been called to the Tuscan hilltown of Arezzo to probe a dozen alleged sightings of the ghost of legendary 18th-century alchemist, adventurer, con-man and occult dabbler 'Count' Cagliostro ... An alchemist, fake physician and necromancer, Cagliostro became extremely rich selling miraculous cures and elixirs of youth, also posing as the founder of an occult branch of freemasonry. Although he was an impostor, his daring and ingenuity briefly made him the darling of Europe. He was wined and dined by high society across the continent and wound up marrying a member of a high-born Roman family. His real name was Giuseppe Balsamo and he was born to a poor family in Palermo in 1743."
More here. Of course, he is a character in RAW's "Historical Illuminatus!" books.
Via Brian Shields at Robert Anton Wilson Fans on Facebook.