Otto II's three-year-old son Otto III was crowned as King of Germany in Aachen on Christmas Day in 983, three weeks after his father's death. Otto III was crowned by Willigis, the Archbishop of Mainz, and John, the Archbishop of Ravenna. News of Otto II's death first reached Germany after Otto III's coronation. The unresolved problems in southern Italy and the Slavic uprising on the Empire's eastern border made the Empire's political situation extremely unstable. The arrival of a minor on the Imperial throne threw the Empire into confusion, allowing Otto III's mother, the Byzantine Princess Theophanu, to reign as his regent.