Conrad IV of Germany
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Conrad IV, Conrad of Hohenstaufen (April 25, 1228 Andria, Italy – May 21, 1254, Lavello), was king of Jerusalem (as Conrad II) 1228–1254, of Germany 1237–1254, and of Sicily (as Conrad I) 1250–1254. He was a son of Frederick II, Holy Roman Emperor and Queen regnant Yolande of Jerusalem.
Frederick II deposed his eldest son, Conrad's older brother Henry, and in his stead in 1237 had Conrad elected King of the Romans, meaning King of Germany and presumed future Emperor of the Holy Roman Empire, with Archbishop Siegfried II of Mainz acting as German regent until 1242, when Frederick chose Henry Raspe, Landgrave of Thuringia, and Wenceslaus I of Bohemia, to assume this function. However, when Pope Innocent IV imposed a papal ban on Frederick in 1245, Henry Raspe supported the pope who in turn arranged to have Raspe elected as counter-king of Germany on 22 May 1246. Raspe defeated Conrad in the battle of Nidda in August 1246, but died several months later.
Also in 1246, Conrad married Elisabeth of Bavaria, a daughter of Otto II Wittelsbach, Duke of Bavaria. They had a son, Conradin, in 1252.
When Frederick II died in 1250, he passed Sicily and Germany to Conrad, but the struggle with the pope continued. Conrad invaded Italy in 1251, but not with enough success to subdue the pope's supporters, and the pope in turn offered Sicily to Edmund Crouchback, son of Henry III of England (1253).
Conrad was excommunicated in 1254, but died of a fever in the same year, and it was left to his infant son Conradin, born in 1252 and beheaded at age 16 in 1268, to continue the struggle with the Papacy.
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| width="30%" align="center" rowspan="2" | Preceded by:
Frederick II
| width="40%" align="center" | King of Germany
1237–1254
| width="30%" align="center" | Succeeded by:
William of Holland
|-
| width="40%" align="center" | King of Sicily
1250–1254
| width="30%" align="center" rowspan="2" | Conradin
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| width="30%" align="center" | Frederick and Yolande
| width="40%" align="center" | King of Jerusalem
1228–1254
Template:End boxde:Konrad IV. (HRR)
et:Konrad IV (Saksa kuningas)
es:Conrado IV
fr:Conrad IV (roi des romains)
it:Corrado IV del Sacro Romano Impero
ja:コンラート4世
pl:Konrad IV (król Niemiec)
pt:Conrado IV da Germânia
ru:Конрад IV
zh:康拉德四世 (德意志)