Article Nº 1204 Donatary, governor or ruler Vol. I · p. 700
Diogo (Duke Dom)
Original title: Diogo (Duque D.)
Duke of Viseu who inherited the lordship of the Madeira archipelago from his father, the Infante D. Fernando, and was killed by King João II in 1481; the lordship then passed to his brother, the future King Manuel I.
He inherited the lordship (senhorio) of the Madeira archipelago from his father, the Infante Ferdinand, and was Duke of Viseu. He was murdered by his brother-in-law, King John II, on 23 August 1481. On his death the lordship of the archipelago passed to his brother Manuel I, who later became King of Portugal.
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