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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...

Klenze, Leo von

(Encyclopedia)Klenze, Leo von lāˈō fən klĕnˈtsə [key], 1784–1864, German architect and landscape and portrait painter. He was court architect to Jérôme Bonaparte of Westphalia and to Louis I of Bavaria, ...

Leo VI, Byzantine emperor

(Encyclopedia)Leo VI (Leo the Wise or Leo the Philosopher), 862?–912, Byzantine emperor (886–912), son and successor of Basil I. He added to the work of his father by the publication (887–93) of the Basilica,...

Leo XIII, pope

(Encyclopedia)Leo XIII, 1810–1903, pope (1878–1903), an Italian (b. Carpineto, E of Rome) named Gioacchino Pecci; successor of Pius IX. Ordained in 1837, he earned an excellent reputation as archbishop of Perug...

Leo, in astronomy

(Encyclopedia)Leo [Lat.,=the lion], northern constellation lying S of Ursa Major and on the ecliptic (apparent path of the sun through the heavens) between Cancer and Virgo; it is one of the constellations of the z...

Tindemans, Leo

(Encyclopedia)Tindemans, Leo (Leonard Clemence Tindemans), 1922–2014, Belgian stateman. He studied economics at the universities of Antwerp and Ghent, and in 1958 became head of the Flemish Christian Democrats. F...

Esaki, Leo

(Encyclopedia)Esaki, Leo, 1925–, Japanese physicist, Ph.D. Univ. of Tokyo, 1959. Esaki was a researcher with IBM from 1960 until his retirement in 1992. He then served (1992–98) as president of the Univ. of Tsu...

Leo III, Saint, pope

(Encyclopedia)Leo III, Saint, pope (795–816), a Roman; successor of Adrian I. He was attacked about the face and eyes by members of Adrian's family, who hoped to render him unfit for the papacy. Leo recovered and...

Baekeland, Leo Hendrik

(Encyclopedia)Baekeland, Leo Hendrik bākˈlănd [key], 1863–1944, American chemist, b. Belgium, grad. Univ. of Ghent, 1882. In 1889 he emigrated to the United States. He founded (1893) and conducted, until 1899,...

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 ...