Despite initial Papal support for his accession, Henry continued the Investiture Controversy started by his father against the Pope's insistence on control all ecclesiastical appointments in Germany. Invading Italy twice (1110 and 1116) and setting up a rival antipope in opposition to the Pope in Rome, Henry eventually secured a compromise (the Concordat of Worms, 1122) under which the Pope would invest church appointees with their spiritual offices, the Emperor with their lay rights.
Henry IV, Holy Roman Emperor
|List of German Kings and Emperors||
Lothar II, Holy Roman Emperor