On March 26, 1027, Pope John XIX crowned Conrad and his wife Gisela as Emperor and Empress, respectively, in Old Saint Peter's Basilica in Rome. The event lasted seven days and was attended by Conrad's son and heir Henry, Cnut the Great, King of England, Denmark and Norway, Rudolph III of Burgundy and around 70 senior clerics, including the Archbishops of Cologne, Mainz, Trier, Magdeburg, Salzburg, Milan, and Ravenna. Rudolph of Burgundy's attendance suggested surprisingly good relations between Burgundy and the Holy Roman Empire. During the festivities a power struggle between the archbishops of Milan and Ravenna ensued and was settled in favor of Milan. Subsequently, Conrad left Rome and toured south to receive homage from the Southern Italian principalities of Capua and Salerno and the Duchy of Benevento.