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Manetho

(Encyclopedia)Manetho mănˈĭthō [key], fl. 300 b.c., Egyptian historian, a priest at Heliopolis, under Ptolemy I and Ptolemy II. His work, covering the history of Egypt from legendary times to 323 b.c., is writt...

Philip, Roman emperor

(Encyclopedia)Philip or Philip the Arabian (Marcus Julius Philippus), 204?–249, Roman emperor (244–49). He served under Gordian III against the Persians, instigated the assassination of the emperor, and conclud...

Bentivoglio

(Encyclopedia)Bentivoglio bānˈtēvōˈlyō [key], Italian noble family, one of several powerful clans in the struggle for control of Bologna during most of the 15th cent. Its greatest member was Giovanni II, who ...

Leo X, pope

(Encyclopedia)Leo X, 1475–1521, pope (1513–21), a Florentine named Giovanni de' Medici; successor of Julius II. He was the son of Lorenzo de' Medici, was made a cardinal in his boyhood, and was head of his fami...

Romagna

(Encyclopedia)Romagna rōmäˈnyä [key], historic region, N central Italy, bordering on the Adriatic Sea in the east, now included in the regions of Emilia-Romagna, Marche, and Tuscany. Although its boundaries var...

Hall effect

(Encyclopedia)Hall effect, experiment that shows the sign of the charge carriers in a conductor. In 1879 E. H. Hall discovered that when he placed a metal strip carrying a current in a magnetic field, a voltage dif...

Hirtius, Aulus

(Encyclopedia)Hirtius, Aulus ôˈləs hûrˈshēəs [key], d. 43 b.c., Roman soldier. He was a friend of Julius Caesar, with whom he served in Gaul. After Caesar's assassination (44 b.c.) Hirtius and Caius Vibius P...

Vanini, Lucilio

(Encyclopedia)Vanini, Lucilio lo͞ochēˈlyō vänēˈnē [key], c.1585–1619, Italian philosopher, who gave himself the name Julius Caesar. A freethinker, he was persecuted for his ideas and driven from one Europ...

Sommer, William

(Encyclopedia)Sommer, William, 1867–1949, American painter and lithographer, b. Detroit. He was apprenticed as a lithographer and studied drawing with Julius Melchers in Detroit and drawing and painting in Munich...

Ptolemy XIV

(Encyclopedia)Ptolemy XIV, d. 44 b.c., king of ancient Egypt (47–44 b.c.), the last of the Macedonian dynasty, but for his sister, Cleopatra. He was a child when his brother Ptolemy XIII drowned. Julius Caesar ma...