Aachen Cathedral, is a Roman Catholic church in Aachen, western Germany, and the see of the Roman Catholic Diocese of Aachen. It is one of the oldest cathedrals in Europe and was constructed by order of the emperor Charlemagne, who was buried there after his death in 814. In the western gallery on the lower floor, opposite the choir, the Throne of Charlemagne is to be found, which has been the object of new investigations in the past decades. The original Carolingian throne came from the spolia of the Church of the Holy Sepulchre in Jerusalem. The appearance of the throne and its location in the Palatine Chapel did not change with the passage of centuries. Between 936 and 1531, thirty one German kings ascended to this throne after their anointment and coronation at the Marienaltar (Altar of Mary).
At the age of almost 24, Otto I assumed his father's position as Duke of Saxony and King of Germany. His coronation was held on 7 August 936 in Charlemagne's former capital of Aachen at Aachen Cathedral where Otto was anointed and crowned by Hildebert, the Archbishop of Mainz.