Roberto Calvi (1920-1982), chairman of Italy's Banco Ambrosiano and a Vatican Bank intermediary.
The engine notes him as the deadly meeting point between Vatican finance, a secret Masonic lodge, and the Mafia.
He ran Banco Ambrosiano and dealt with the Vatican Bank (IOR), and was found hanged under Blackfriars Bridge in London on June 18, 1982; first ruled a suicide, an Italian court in 2003 ruled it murder, but the case was never solved, sitting at the crossroads of the P2 Masonic Lodge, the Sicilian Mafia, and the Vatican Bank.
It matters as a stark example of high finance, secret societies, and organized crime fatally overlapping, with the killing still unsolved.