German king Henry IV, future emperor of the Holy Roman Empire, was orphaned young and traumatized during his mother's regency and his own kidnapping till majority by the imperial bishops and princes. When the reformist monk Hldebrandt became pope Gregory IV, declared only the Holy Chair superior by divine right to all earthly monarchs and denied them the investiture (right to install bishops, traditionally the emperor-loyal counterweight to feudal dynasties), Henry started a power struggle. Excommunicated, Henry had to beg readmission to the church at Canossa castle, but once that was obtained, suppressed the rebellious imperial princes and bishops in war. Later he even installed an anti-pope, who crowned Henry Holy Roman emperor, while Gregory died in exile and a compromise allowed the monarchs to install the bishops concerning all temporal privileges of their sees.