After he received the deposed Peter Orseolo in his court, a king of this name invaded Hungary to remove Samuel Aba and reinstate him as king. After a failed rescue mission by Robert I of Capua, Pope Paschal II was forced to crown a king of this name. Rudolf of Rheinfelden attempted to claim the throne of a king of this name during an event where he sought peace at the castle of Matilda of Tuscany. The Concordat of Worms was agreed to by a king of this name after the Investiture Controversy reached a peak during the reign of his father of the same name. A king of this name fasted for three days in public penance after he was excommunicated by Pope Gregory VII. For 10 points, a Holy Roman Emperor of what name publicly repented during the Walk to Canossa? ■END■
ANSWER: Henry [accept Henry III Salian or Henry IV Salian or Henry V Salian; accept Heinrich in place of “Henry”]
<Editors, European History>
= Average correct buzz position