This man was victorious at the Battle of Vise, but he was imprisoned by his son at Bockelheim Castle and was the target of both the Lenten Synod and the Dictatus Papae. During his reign, this monarch faced uprisings led by Rudolf of Rheinfeld and Henry of Luxembourg, but is best known for an action 
This man was victorious at the Battle of Vise, but he was imprisoned by his son at Bockelheim Castle and was the target of both the Lenten Synod and the Dictatus Papae. During his reign, this monarch faced uprisings led by Rudolf of Rheinfeld and Henry of Luxembourg, but is best known for an action resulting from his appointment of Guibert of Ravenna as antipope Clement III. For 10 points, name this Holy Roman Emperor involved in the Investiture Controversy with Pope Gregory VII, who was forced to repent by standing in the snow for three days outside Canossa.
This man was victorious at the Battle of Vise, but he was imprisoned by his son at Bockelheim Castle and was the target of both the Lenten Synod and the Dictatus Papae.
{Henry IV} of the Holy Roman Empire