Hohenstaufen - German princely family, whose name is derived from the castle of Staufen built in 1077 by a Swabian count, Frederick. In 1079, Frederick married Agnes, daughter of Holy Roman Emperor Henry IV, and was created duke of Swabia. The line of German kings and Holy Roman emperors began in 1138 with Frederick's son Conrad III, who was succeeded by Frederick I, Henry VI, and Philip of Swabia. Their chief rivals were the Guelphs, whose scion, Otto IV, was Holy Roman emperor from 1209 to 1215; but the Hohenstaufen heir, Frederick II, was elected king by a rival party in 1212. The most spectacular representative of the house, Frederick, shifted the center of the family interests to Sicily and Southern Italy. His involvement in Italy brought him into conflict with the popes, who worked at bringing about the downfall of the house. Shortly after Frederick's death (1250) his son Conrad IV died and Conradin, the last legitimate Hohenstaufen, became titular king of Sicily; his uncle Manfred, an illegitimate son of Frederick II, seized the regency for him. Manfred's death in 1258 and Conradin's execution in 1268 ended the family power, and with the death of Frederick's illegitimate son Enzio in 1272, the family became extinct. Memories of the German empire's greatness under the Hohenstaufen played a part in later German history and inspired legends such as that of the Kyffhauser.
		Emperor Frederick Hohenstaufen - Frederick of Hohenstaufen was born December 26, 1194. His father was Henry, the Holy Roman Emperor and King of Sicily, and son of Frederick Barbarossa. His mother was Constance, daughter of Roger II of Sicily. Henry died in 1197, leaving Frederick to become Emperor of the Germans at age two and King of Sicily at age three. Constance died six months later, leaving Frederick under the guardianship of Pope Innocent III. Frederick was raised in the court at Palermo until he took over the government at the age of fourteen. When Frederick began his reign, Sicily was in debt and the King was forced to impose high taxes. He introduced laws to promote justice and reduce corruption, but imposed them forcibly, autocratically, and sometimes ruthlessly. While he loved Sicily above his other possessions he seldom remained there, instead leaving his wife, Constance of Aragon, as regent. This caused his subjects in Sicily to question his loyalty to their interests. Finally, he drafted men from Sicily, often for wars in other parts of Frederick's domain. All of these things resulted in Frederick's unpopularity among his Sicilian subjects, although Sicily became prosperous under his rule, and his interest in scholarship and the arts made Frederick's court a major cultural and scientific center of the time. Frederick's second wife, Yolanda of Brienne, was heiress to the Kingdom of Jerusalem. After his marriage, Frederick undertook a crusade with the primary goal of increasing his influence in the Middle East. Through a treaty with the Sultan of Egypt, he succeeded in taking Palestine without bloodshed, and in 1229 crowned himself King of Jerusalem. His autocratic style quickly made him unpopular in his new kingdom, as in Sicily. Frederick's relations with the Church began peacefully enough, with his former guardian Innocent III gaining him the throne of the Germans and Innocent's successor Honorius crowning him Holy Roman Emperor in 1220. However, Frederick soon began making aggressive moves against the Lombard towns of Italy, an apparent prelude to an attack on the Papal States. Pope Gregory IX excommunicated Frederick, for his procrastination in fulfilling a vow to go on crusade (this was prior to the crusade that made him King of Jerusalem). Pope Gregory further declared a holy war against Frederick. The war between Frederick and Gregory, and later Innocent IV, spread throughout Italy, into Germany, and in time to all of Europe. The Papacy had little in the way of its own army, but was able to call upon supporters from throughout Christendom to battle the  Frederick. Frederick had Germany, Sicily, and later Jerusalem, as well as supporters in Italy and other parts of Europe, but little loyalty among his subjects. As a result, rival parties of the Pope and the Emperor, the Guelfs and Ghibellines, battled throughout Europe until Frederick's death and, particularly in Italy, long afterwards. Frederick may have been near to victory when he succumbed to illness in 1250 and was entombed in Palermo. Frederick became known as the Stupor Mundi, the Wonder of the World, for his excellence in administration, military tactics, science, and scholarship. However, his ruthlessness in pursuit of Empire made him disliked throughout his domains and throughout Europe.