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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...

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 ...

Confraternity of Christian Doctrine

(Encyclopedia)Confraternity of Christian Doctrine: see Bible. ...

Christian art and architecture

(Encyclopedia)Christian art and architecture: see especially the survey articles on Early Christian art and architecture, Byzantine art and architecture, Coptic art, Merovingian art and architecture, Carolingian ar...

grace, in Christian theology

(Encyclopedia)grace, in Christian theology, the free favor of God toward humans, which is necessary for their salvation. A distinction is made between natural grace (e.g., the gift of life) and supernatural grace, ...

Kaboré, Roch Marc Christian

(Encyclopedia)Kaboré, Roch Marc Christian, 1957–, Burkinabé political leader. Following a career in banking, he joined Blaise Compaoré's government, serving as minister of transport and communications (1989–...