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Birds, Reptiles & Other Vertebrates. Bugs, Mollusks & Other Invertebrates. Fossils & Geologic Time. History of Germany - Germany from 1250 to 1493: The death of Frederick II in 1250 and of his son Conrad IV in 1254 heralded the irreversible decline of Hohenstaufen power in Germany and in the conjoint kingdoms of Naples and Sicily. Conrad’s ...

Conrad (25 April 1228 – 21 May 1254), a member of the Hohenstaufen dynasty, was the only son of Emperor Frederick II from his second marriage with Queen Isabella II of Jerusalem. He inherited the title of King of Jerusalem (as Conrad II) upon the death of his mother in childbed.

Conrad III ( German: Konrad; Italian: Corrado; 1093 or 1094 – 15 February 1152) of the Hohenstaufen dynasty was from 1116 to 1120 Duke of Franconia, from 1127 to 1135 anti-king of his predecessor Lothair III, and from 1138 until his death in 1152 King of the Romans in the Holy Roman Empire.

21 May 1254 (statement with Gregorian date earlier than 1584) Lavello Manner of death natural causes Cause of death malaria Place of burial Messina Cathedral Country of citizenship Germany Occupation sovereign Position held Duke of Swabia Noble title duke Family House of Hohenstaufen Father Frederick II, Holy Roman Emperor Mother

Conrad IV of Germany Conrad (25 April 1228 – 21 May 1254), a member of the Hohenstaufen dynasty, was the only son of Emperor Frederick II from his second marriage with Queen Isabella II of Jerusalem. He inherited the title of King of Jerusalem (as Conrad II) upon the death of his mother in childbed.

Conrad IV [1], 1228–54, German king (1237–54), king of Sicily and of Jerusalem (1250–54), son of Holy Roman Emperor Frederick II [2]. He was elected (1237) king of the Romans at his father's instigation after Frederick had deposed Conrad's older brother Henry in Germany.