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Feodor II

(Encyclopedia)Feodor II, 1589–1605, czar of Russia (1605). He succeeded his father, Boris Godunov, but was assassinated when the first false Dmitri was proclaimed czar. ...

Vienna, Congress of

(Encyclopedia)Vienna, Congress of, Sept., 1814–June, 1815, one of the most important international conferences in European history, called to remake Europe after the downfall of Napoleon I. Although the territo...

Louis IX, king of France

(Encyclopedia)Louis IX or Saint Louis, 1214–70, king of France (1226–70), son and successor of Louis VIII. His mother, Blanche of Castile, was regent during his minority (1226–34), and her regency probably la...

Prokopovich, Feofan

(Encyclopedia)Prokopovich, Feofan fāəfänˈ prəkəpôˈvĭch [key], 1681–1736, Russian churchman. He was appointed bishop by Czar Peter I to carry out his ecclesiastic reforms and wrote Spiritual Regulation (1...

Frederick II, king of Sicily

(Encyclopedia)Frederick II, 1272–1337, king of Sicily (1296–1337), 3d son of Peter III of Aragón. When his brother, who was king of Sicily, became (1291) king of Aragón as James II, Frederick was his regent i...

Arnold of Brescia

(Encyclopedia)Arnold of Brescia brĕshˈə [key], c.1090–1155, Italian monk and reformer, b. Brescia. A priest of irreproachable life, Arnold studied at Paris, where according to tradition he was a pupil of Peter...

chrysoberyl

(Encyclopedia)chrysoberyl krĭsˈəbĕrˌĭl [key] [Gr.,=golden beryl], a beryllium aluminate used as a gem. It has a vitreous luster and is transparent to translucent. The more valuable cat's-eye is a variety of c...

Ivan IV

(Encyclopedia)Ivan IV or Ivan the Terrible, 1530–84, grand duke of Moscow (1533–84), the first Russian ruler to assume formally the title of czar. In his later years, Ivan's character, always stern, grew tyra...

Osterman, Andrei Ivanovich, Count

(Encyclopedia)Osterman, Andrei Ivanovich, Count əndrāˈ ēväˈnəvĭch əstyĭrmänˈ [key], 1686–1747, Russian statesman, b. Germany. His original name was Heinrich Johann Friedrich Ostermann. Under Czar Pete...

Ratcliffe, Sir Peter John

(Encyclopedia)Ratcliffe, Sir Peter John, 1954–, British cellular and molecular biologist, M.D., Cambridge, 1987. He has been a researcher at Oxford since 1987. Ratcliffe, along with William Kaelin and Gregg Semen...