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Constance, Holy Roman empress

(Encyclopedia)Constance, 1154–98, Holy Roman empress, wife of Holy Roman Emperor Henry VI; daughter of King Roger II of Sicily. She was named heiress of Sicily by her nephew King William II. On his death, however...

William, crown prince of Germany

(Encyclopedia)William or Frederick William, 1882–1951, crown prince of Germany, son of William II. In World War I he commanded (1914) an army on the Western Front and was nominal commander in the German attack (1...

Isaac II

(Encyclopedia)Isaac II (Isaac Angelus) ănˈjələs [key], d. 1204, Byzantine emperor (1185–95, 1203–4). The great-grandson of Alexius I, he was proclaimed emperor by the mob that had killed the unpopular Andro...

William, count of Holland

(Encyclopedia)William, count of Holland, 1227?–1256, German king (1254–56), previously rival king (1247–54) to Conrad IV. William was chosen by Pope Innocent IV to succeed Henry Raspe (d. 1247) as antiking to...

Roger II

(Encyclopedia)Roger II, c.1095–1154, count (1101–30) and first king (1130–54) of Sicily, son and successor of Roger I. He conquered (1127) Apulia and Salerno and sided with the antipope Anacletus II against P...

Pius II

(Encyclopedia)Pius II pīˈəs [key], 1405–64, pope (1458–64), an Italian named Enea Silvio de' Piccolomini (often in Latin, Aeneas Silvius), renamed Pienza after him, b. Corsigniano; successor of Calixtus III....

Stanislaus II

(Encyclopedia)Stanislaus II, 1732–98, last king of Poland (1764–95). He was born Stanislaus Augustus Poniatowski. His mother was a member of the powerful Czartoryski family, which furthered Stanislaus's career....

Potsdam

(Encyclopedia)Potsdam pŏtsˈdăm [key], city (1994 pop. 139,262), capital of Brandenburg, E Germany, on the Havel River, near Berlin. It is an industrial center and rail junction. Manufactures include processed fo...

Calixtus II

(Encyclopedia)Calixtus II, Callixtus II, or Callistus II, d. 1124, pope (1119–24), named Guy of Burgundy, successor of Gelasius II. The son of count William I of Burgundy, he was archbishop of Vienne during the ...

Douglass, Frederick

(Encyclopedia)Douglass, Frederick dŭgˈləs [key], c.1818–1895, American abolitionist, b. near Easton, Md. as Frederick Augustus Washington Bailey. The son of a black slave, Harriet Bailey, and a white father, m...