Pietro Paleologo Mastrogiovanni

Pietro Paleologo Mastrogiovanni
Born(1931-03-05)5 March 1931
Died2017(2017-00-00) (aged 85–86)
OccupationsPsychiatrist, pretender

Pietro Donato Paleologo Mastrogiovanni (5 March 1931 – 2017), self-styled as Pietro III Paleologo or Pietro III Paleologo Mastrogiovanni, was an Italian psychiatrist and pretender. Claiming descent from Thomas Palaiologos, a brother of the last Byzantine emperor, though a son called "Rogerio", whose existence is overwhelmingly dismissed as fantasy in scholarship, Mastrogiovanni claimed to be the sole legitimate pretender to the throne of the Byzantine Empire. None of the sparse documents supposedly confirming Mastrogiovanni's descent have been authenticated.