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Piccolomini, Enea Silvio de'

(Encyclopedia)Piccolomini, Enea Silvio de': see Pius II. ...

Antonelli, Giacomo

(Encyclopedia)Antonelli, Giacomo jäˈkōmō äntōnĕlˈlē [key], 1806–76, Italian cardinal and statesman of the Roman Catholic Church, adviser to Pope Pius IX. He received the red hat of the cardinalate in 184...

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...

Muhammad IV, Ottoman sultan

(Encyclopedia)Muhammad IV or Mehmet IV, 1641–92, Ottoman sultan (1648–87). He was proclaimed sultan of the Ottoman Empire (Turkey) by the corps of Janissaries after the deposition and murder of his father, Sult...

Leo IV, Saint, pope

(Encyclopedia)Leo IV, Saint, d. 855, pope (847–55), a Roman; successor of Sergius II. He had seen the Saracen attack on Rome (846), and to prevent its recurrence he fortified the city and its suburbs. He built a ...

Leo IV, Byzantine emperor

(Encyclopedia)Leo IV (Leo the Khazar), d. 780, Byzantine emperor (775–80), son and successor of Constantine V. He owed his nickname to his mother, a Khazar princess. Leo tempered the iconoclastic excesses of his ...

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...

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 ...

Benedict XV

(Encyclopedia)Benedict XV, 1854–1922, pope (1914–22), an Italian (b. Genoa) named Giacomo della Chiesa; successor of Pius X. He was made archbishop of Bologna in 1907 and cardinal in 1914, two months before his...

Gregory XVI

(Encyclopedia)Gregory XVI, 1765–1846, pope (1831–46), an Italian named Bartolomeo Alberto Capellari, b. Belluno; successor of Pius VIII. In 1783 he became a Camaldolite and was (1825) created cardinal. Gregory ...