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Martin IV, d. 1285, pope

(Encyclopedia)Martin IV, d. 1285, pope (1281–85), a Frenchman named Simon de Brie; successor of Nicholas III. He was chancellor under Louis IX of France and was created cardinal by Urban IV. He was thus a support...

Martin V, 1368–1431, pope

(Encyclopedia)Martin V, 1368–1431, pope (1417–31), a Roman named Oddone Colonna; successor of Gregory XII. He was created cardinal by Innocent VII, and in the schism (see Schism, Great) he attended and supporte...

Sylvester II

(Encyclopedia)Sylvester II, c.945–1003, pope (999–1003), a Frenchman (b. Auvergne) named Gerbert; successor of Gregory V. In his youth he studied at Muslim schools in Spain and became learned in mathematics and...

Rainalducci, Pietro

(Encyclopedia)Rainalducci or Rainallucci, Pietro pyĕˈtrō rīnäldo͞otˈchē, rīnäl-lo͞otˈchē [key], d. 1333, Italian churchman (b. Corvaro, near Rieti), antipope (1328–30) with the name Nicholas V. Havin...

Cossa, Baldassare

(Encyclopedia)Cossa, Baldassare bäldäs-säˈrā kôsˈsä [key], c.1370–1419, Neapolitan churchman, antipope (1410–15; see Schism, Great) with the name John XXIII. He had a military career before entering the...

Urban V

(Encyclopedia)Urban V, 1310–70, pope (1362–70), a Provençal named Guillaume de Grimoard; successor of Innocent VI. He was a Benedictine renowned for his knowledge of canon law. The great event of Urban's ponti...

Macdonald, Sir John Alexander

(Encyclopedia)Macdonald, Sir John Alexander, 1815–91, Canadian statesman, first prime minister of the Dominion of Canada, b. Glasgow. His parents settled in 1820 in Kingston, Ont. Macdonald first practiced law. W...

Frémont, John Charles

(Encyclopedia)Frémont, John Charles, 1813–90, American explorer, soldier, and political leader, b. Savannah, Ga. He taught mathematics to U.S. naval cadets, then became an assistant on a surveying expedition (18...

Calixtus III

(Encyclopedia)Calixtus III, Callixtus III, or Callistus III, 1378–1458, pope (1455–58), a Spaniard (b. Játiva) named Alonso de Borja or, in Italian, Alfonso Borgia; successor of Nicholas V. He acted as arbitr...

Vatican City

(Encyclopedia)CE5 Vatican City vătˈĭkən [key] or Holy See, officially Holy See (State of the Vatican City), independent state (2015 est. pop. 1,000), 108.7 acres (44 hectares), within the city of Rome, Italy...