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Louis I, king of Portugal

(Encyclopedia)Louis I, 1838–89, king of Portugal (1861–89), son of Maria II and Ferdinand II. He succeeded to the throne on the death of his brother Peter V. His reign was marked by much political turmoil and b...

Alfonso VI, king of Portugal

(Encyclopedia)Alfonso VI, 1643–83, king of Portugal (1656–83), son and successor of John IV. Slightly paralyzed and mentally defective, he led a dissolute youth until he came under the influence of the count of...

Alfonso IV, king of Portugal

(Encyclopedia)Alfonso IV, 1291–1357, king of Portugal (1325–57), son and successor of Diniz. Disgruntled by the favoritism his father showed toward Alfonso's illegitimate half-brothers, Alfonso rose in revolt i...

John I, king of Portugal

(Encyclopedia)John I (John the Great), 1357?–1433, king of Portugal (1385–1433), illegitimate son of Peter I. He was made (1364) grand master of the Knights of Aviz and exercised his influence in opposition to ...

Ferdinand I, king of Portugal

(Encyclopedia)Ferdinand I, 1345–83, king of Portugal (1367–83), son and successor of Peter I. His ambitions and his private life plunged the realm into disaster, although during his reign agricultural reform wa...

Duarte, king of Portugal

(Encyclopedia)Duarte dwärˈtə [key], 1391–1438, king of Portugal (1433–38), eldest of the five sons of John I. He was a “philosopher-king,” notable for his legal reforms and as the author of O leal consel...

John III, king of Portugal

(Encyclopedia)John III (John the Fortunate), 1502–57, king of Portugal (1521–57), son of Manuel I. His reign saw the Portuguese empire at its apogee. The great Asian possessions were extended by further conques...

John IV, king of Portugal

(Encyclopedia)John IV, 1604–56, king of Portugal (1640–56). He succeeded as duke of Braganza in 1630. Descended from Manuel I and in illegitimate line from John I, he had the strongest claim to the Portuguese t...

Alfonso III, king of Portugal

(Encyclopedia)Alfonso III, 1210–79, king of Portugal (1248–79), son of Alfonso II, brother and successor of Sancho II. By his marriage with Matilda, countess of Boulogne, he became count of Boulogne and thus wa...

Alfonso I, king of Portugal

(Encyclopedia)Alfonso I, 1109?–1185, first king of Portugal, son of Henry of Burgundy. After his father's death (1112), his mother, Countess Teresa, ruled the county of Portugal with the help of her Spanish lover...