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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...

Ladislaus IV, king of Poland

(Encyclopedia)Ladislaus IV, 1595–1648, king of Poland (1632–48), son and successor of Sigismund III. His reign was marked by struggles with his subjects and wars with the Swedes, the Russians, and the Ottomans....

Philip IV, king of France

(Encyclopedia)Philip IV (Philip the Fair), 1268–1314, king of France (1285–1314), son and successor of Philip III. The policies of his reign greatly strengthened the French monarchy and increased the royal reve...

Peter IV, king of Aragón

(Encyclopedia)Peter IV (Peter the Ceremonious), 1319?–1387, king of Aragón and count of Barcelona (1336–87); son and successor of Alfonso IV. He supported Alfonso XI of Castile at the battle of Tarifa (1340), ...

Charles IV, duke of Lorraine

(Encyclopedia)Charles IV, 1604–75, duke of Lorraine. He succeeded to the duchy in 1624 but was to lose it several times because of his anti-French policy. In 1633, French troops invaded Lorraine in retaliation fo...

Carlos, second son of Charles IV of Spain

(Encyclopedia)Carlos (Carlos María Isidro de Borbón), 1788–1855, second son of Charles IV of Spain. He was the first Carlist pretender. After his father's abdication (1808) he was, with the rest of his family, ...

Louis IV, French king

(Encyclopedia)Louis IV or Louis d'Outremer lwē do͞otrəmĕrˈ [key] [Fr.,=Louis from overseas], 921–54, French king (936–54), son of King Charles III (Charles the Simple). He spent his youth as an exile in En...

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