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Otto IV, Holy Roman emperor

(Encyclopedia)Otto IV, 1175?–1218, Holy Roman emperor (1209–15) and German king, son of Henry the Lion, duke of Saxony. He was brought up at the court of his uncle King Richard I of England, who secured his ele...

Romanus II

(Encyclopedia)Romanus II, 939–63, Byzantine emperor (959–63), son and successor of Constantine VII. A profligate, he came under the domination of his second wife, Theophano. She, along with the eunuch Joseph Br...

Abd ar-Rahman III, emir and caliph of Córdoba

(Encyclopedia)Abd ar-Rahman III, 891–961, Umayyad emir (912–29) and first caliph (929–61) of Córdoba. When he succeeded to the throne, the Spanish emirate was reduced to Córdoba and its environs and beset w...

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...

Ostrogoths

(Encyclopedia)Ostrogoths (East Goths), division of the Goths, one of the most important groups of the Germans. According to their own unproved tradition, the ancestors of the Goths were the Gotar of S Sweden. By th...

Muhammad II, Ottoman sultan

(Encyclopedia)Muhammad II or Mehmet II (Muhammad the Conqueror), 1429–81, Ottoman sultan (1451–81), son and successor of Murad II. He is considered the true founder of the Ottoman Empire (Turkey). He completed ...

Guibert of Ravenna

(Encyclopedia)Guibert of Ravenna gwĭbˈərt, gēbĕrˈ [key], d. 1100, Italian churchman, antipope (1080–1100) Clement III, b. Parma. As imperial chancellor of Italy (1057–63), he consistently supported the Ho...

Otto of Freising

(Encyclopedia)Otto of Freising frīˈzĭng [key], b. after 1111, d. 1158, German chronicler, bishop of Freising. He was a son of Leopold III of Austria, a half-brother of Emperor Conrad III, and an uncle of Emperor...

Monotheletism

(Encyclopedia)Monotheletism or Monothelitism both: mənŏthˈə lĭtĭzˌəm [key] [Gr.,=one will], 7th-century opinion condemned as heretical by the Third Council of Constantinople in 680 (see Constantinople, Thir...

Angevin

(Encyclopedia)Angevin ănˈjəvĭn [key] [Fr.,=of Anjou], name of two medieval dynasties originating in France. The first ruled over parts of France and over Jerusalem and England; the second ruled over parts of Fr...