tutor, Egilbert, Bishop of Freising, refused to allow it, as Adalbero was a vassal of the King, not the Emperor. The German magnates, having legally elected Henry, would not recognise the deposition unless their king did also. After many angry protests, Conrad finally knelt before his son and pleaded for his desired consent, which was finally given. However, Conrad II used the simple title "king" or on occasion "king of the Franks and Lombards" before Imperial coronation, while his son Henry III introduced the title "King of the Romans" before the Imperial coronation. His grandson Henry IV used both "king of the Franks and Lombards" and King of the Romans before Imperial coronation. Beginning in the late eleventh century, during the Investiture Controversy, the Papal curia began to use the term regnum teutonicorum to refer to the realm of Henry IV in an effort to reduce him to the level of the other kings of Europe, while he himself began to use the title rex Romanorum or King of the Romans to emphasise his divine right to the imperium Romanum. This title was employed most frequently by the German kings themselves, though they did deign to employ "Teutonic" titles when it was diplomatic, such as Frederick Barbarossa's letter referring to his receiving the coronam Theutonici regni (crown of the German kingdom). Foreign kings and ecclesiastics continued to refer to the regnum Alemanniae and règne or royaume d'Allemagne. The terms imperium/imperator or empire/emperor were often employed for the German kingdom and its rulers, which indicates a recognition of their imperial stature. However foreign sources combined the imperial titles with "Teutonic" and "Alemannic" which reference a denial of their Romanitas or universal rule. The term regnum Germaniae begins to appear even in German sources at the beginning of the fourteenth century. During the celebrations on the canonisation of Charlemagne in December 1165 and January 1166, Barbarossa also called Aachen the "head and seat of the German Kingdom". When Pope Gregory VII started using the term Regnum Teutonicorum, the concept of a "distinct territorial kingdom" separate from Kingdom of Italy was already widely recognised on both sides of the Alps, and this entity was at least externally perceived as "German" in nature. Contemporary writers representing various German vassal rulers also adopted this terminology under papal influence. In the Papal-Imperial Concordat of Worms of 1122, which put an end to the Investiture Controversy, the