Overview
Conrad III (25 March 1252 – 29 October 1268), called the Younger or the Boy, but usually known by the diminutive Conradin, was the last direct heir of the House of Hohenstaufen. He was Duke of Swabia (1254–1268) and nominal King of Jerusalem (1254–1268) and Sicily (1254–1258). After his attempt to reclaim the Kingdom of Sicily for the Hohenstaufen dynasty failed, he was captured and beheaded.
Early childhood
Conradin was born in Wolfstein, Bavaria, to Conrad IV of Germany and Elisabeth of Bavaria. Though he never succeeded his father as Roman-German king, he was recognized as king of Sicily and Jerusalem by supporters of the Hohenstaufens in 1254.
Having lost his father in 1254, he grew up at the court of his uncle and guardian, Louis II, Duke of Bavaria. His guardians were able to hold Swabia for him. Jerusalem was held by a relative from the royal house of Cyprus as regent. In Sicily, his father's half-brother Manfred continued as regent, but began to develop plans to usurp the kingship.
Little is known of his appearance and character except that he was as "beautiful as Absalom, and spoke good Latin". Although his father had entrusted him to the guardianship of the church, Pope Alexander IV forbade Conradin's election as Roman-German king and offered the Hohenstaufen lands in Germany to King Alfonso X of Castile.
From Wikipedia (CC BY-SA 4.0).