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Constantinople, Fourth Council of

(Encyclopedia)Constantinople, Fourth Council of, 869–70, regarded as the eighth ecumenical council by the modern Roman Catholic Church. It has never been accepted by the Orthodox Church, which instead recognizes ...

Heraclius

(Encyclopedia)Heraclius hĕrəklīˈəs, hĭrăkˈlēəs [key], c.575–641, Byzantine emperor (610–41). The son of a governor of Africa, he succeeded the tyrant Phocas, whom he deposed and had executed. In the e...

Godfrey of Bouillon

(Encyclopedia)Godfrey of Bouillon bo͞oyôNˈ [key], c.1058–1100, Crusader, duke of Lower Lorraine. He fought for Holy Roman Emperor Henry IV against Pope Gregory VII and against Rudolf of Swabia and was rewarded...

Philip of Hesse

(Encyclopedia)Philip of Hesse hĕs [key], 1504–67, German nobleman, landgrave of Hesse (1509–67), champion of the Reformation. He is also called Philip the Magnanimous. Declared of age in 1518, he helped suppre...

Oldenbarneveldt, Johan van

(Encyclopedia)Oldenbarneveldt, Johan van yōhänˈ vän ôlˌdənbärˈnəvĕlt [key], 1547–1619, Dutch statesman. He aided William the Silent in the struggle for Dutch independence from Spain and opposed the dic...

Edessa

(Encyclopedia)Edessa ĭdĕsˈə [key], ancient city of Mesopotamia, on the site of modern Şanlıurfa, Turkey. It emerged in the 4th cent. b.c. as Orrhoe, or Arrhoe, and was later named Edessa by Seleucus I of Syri...

Andronicus I

(Encyclopedia)Andronicus I (Andronicus Comnenus) ăndrənīˈkəs kŏmnēˈnəs [key], 1120?–1185, Byzantine emperor (1183–85), nephew of John II. He acceded to the throne by strangling his cousin Alexius II. T...

Trebizond, empire of

(Encyclopedia)Trebizond, empire of, 1204–1461. When the army of the Fourth Crusade overthrew (1204) the Byzantine Empire and established the Latin Empire of Constantinople, several Greek successor states sprang u...

Robert Guiscard

(Encyclopedia)Robert Guiscard gēskärˈ [key], c.1015–1085, Norman conqueror of S Italy, a son of Tancred de Hauteville (see Normans). Robert joined (c.1046) his brothers in S Italy and fought with them to expel...

Paulicians

(Encyclopedia)Paulicians pôlĭshˈənz [key], Christian heretical sect. The sect developed in Armenia from obscure origins and is first mentioned in the middle of the 6th cent., where it is associated with Nestori...