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Constantine IV, Byzantine emperor

(Encyclopedia)Constantine IV, c.652–685, Byzantine emperor (668–85), son and successor of Constans II. He defended Constantinople against the annual naval attacks of the Muslims, who finally withdrew in 678; Gr...

Abd al-Aziz IV

(Encyclopedia)Abd al-Aziz IV, 1880–1943, sultan of Morocco (1894–1908), son of Hassan. His weak control was evident after the death (c.1900) of the regent Ba Ahmed. His submissiveness to foreign influence, his ...

Ahmed II

(Encyclopedia)Ahmed II, 1642–95, Ottoman sultan (1691–95), brother and successor of Sulayman II to the throne of the Ottoman Empire (Turkey). Soon after his reign began, the Turkish defeat at Slankamen, Serbia ...

Starhemberg, Ernst Rüdiger, Graf von

(Encyclopedia)Starhemberg, Ernst Rüdiger, Graf von gwēˈdōbältˌ [key], 1657–1737, also took part in the defense of Vienna. He was made field marshal and served with distinction in the War of the Spanish Succ...

Mahmud II

(Encyclopedia)Mahmud II, 1784–1839, Ottoman sultan (1808–39), younger son of Abd al-Hamid I. He was raised to the throne of the Ottoman Empire (Turkey) upon the deposition of his brother, Mustafa IV, and contin...

Mahmud I

(Encyclopedia)Mahmud I mämo͞odˈ, mäˈmo͞od [key], 1696–1754, Ottoman sultan (1730–54), son of Mustafa II, nephew and successor of Ahmed III. A revolt of the Janissaries put him on the throne of the Ottoman...

Ahmed I

(Encyclopedia)Ahmed I äˈmĕd [key], 1589–1617, Ottoman sultan (1603–17), son and successor of Muhammad III to the throne of the Ottoman Empire. The chief event of his reign was the Treaty of Zsitvatorok (1606...

Abd al-Hamid I

(Encyclopedia)Abd al-Hamid I Turk. äbdülˈhämēdˈ [key], 1725–89, Ottoman sultan (1774–89), brother and successor of Mustafa III. His reign, one of decline for the Ottoman Empire (Turkey), saw the end of th...

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....

Louis IV, Holy Roman emperor

(Encyclopedia)Louis IV or Louis the Bavarian, 1287?–1347, Holy Roman emperor (1328–47) and German king (1314–47), duke of Upper Bavaria. After the death of Holy Roman Emperor Henry VII the Luxemburg party amo...