the Fat) attaining the prize. Following the deposition of the latter, local nobles – Guy III of Spoleto and Berengar of Friuli – disputed over the crown, and outside intervention did not cease, with Arnulf of Eastern Francia and Louis the Blind of Provence both claiming the Imperial throne for a time. The kingdom was also beset by Arab raiding parties from Sicily and North Africa, and central authority was minimal at best. In the 10th century, the situation hardly improved, as various Burgundian and local noblemen continued to dispute over the crown. Order was only imposed from outside, when the German king Otto I invaded Italy and seized both the Imperial and Italian thrones for himself in 962. Imperial Italy In 951, King Otto I of Germany married Adelaide of Burgundy, the widow of late King Lothair II of Italy. Otto assumed the Iron Crown of Lombardy at Pavia despite his rival Margrave Berengar of Ivrea. When in 960 Berengar attacked the Papal States, King Otto, summoned by Pope John XII, conquered the Italian kingdom and on 2 February 962 had himself crowned Holy Roman Emperor at Rome. From that time on, the Kings of Italy were always also Kings of Germany, and Italy thus became a constituent kingdom of the Holy Roman Empire, along with the Kingdom of Germany (regnum Teutonicorum) and – from 1032 – Burgundy. The German king (Rex Romanorum) would be crowned by the Archbishop of Milan with the Iron Crown in Pavia as a prelude to the visit to Rome to be crowned Emperor by the Pope. In general, the monarch was an absentee, spending most of his time in Germany and leaving the Kingdom of Italy with little central authority. There was also a lack of powerful landed magnates – the only notable one being the Margraviate of Tuscany, which had wide lands in Tuscany, Lombardy, and the Emilia, but which failed due to lack of heirs after the death of Matilda of Canossa in 1115. This left a power vacuum – increasingly filled by the Papacy and by the bishops, as well as by the increasingly wealthy Italian cities, which gradually came to dominate the surrounding countryside. Upon the death of Emperor Otto III in 1002, one of late Berengar's successors, Margrave Arduin of Ivrea, even succeeded in assuming the Italian crown and in defeating the Imperial forces under Duke Otto I