Arnulf was garnering support among the nobility of Tuscany. Even Adalbert joined him. Finding Rome locked against him and held by Ageltrude, he took the city by force on 21 February 896, freeing the pope. Arnulf was there crowned King and Emperor by Formosus, who declared Lambert deposed. Arnulf marched on Spoleto, where Ageltrude had fled to Lambert, but Arnulf suffered a stroke and had to call off the campaign. That same year, Formosus died, leaving Lambert once again in power. Renovatio regni Francorum After Arnulf returned to Germany and until his death, Lambert and his supporters, most powerful in the northeast and the centre of the peninsula, were in complete control of Italy. He retook Pavia and decapitated Maginulf, Count of Milan, who had joined Arnulf. In October and November, he met Berengar outside of Pavia and the two reached an agreement whereby they parcelled the kingdom out between them, Berengar keeping the realm between the Adda and the Po and Lambert the rest. They shared Bergamo. This was a confirmation of the status quo of 889. Lambert also pledged to marry Gisela, Berengar's daughter. It was this partitioning which caused the later chronicler Liutprand of Cremona to remark that the Italians always suffered under two monarchs. In early 897, Lambert journeyed to Rome with Ageltrude and Guy to receive reconfirmation of his imperial title. The vengeful Lambert and Ageltrude also persuaded Pope Stephen VI, elected by their influence, to put the corpse of Formosus on trial for various crimes. The body, stripped of its papal robes and mutilated, was thrown into the river Tiber after the "Cadaver Synod." In January 898, Pope John IX rehabilitated Formosus against their will. Lambert convened a diet at Ravenna in February. Seventy bishops met and confirmed the pact of 891, the invalidity of Arnulf's coronation, and the validity of Lambert's imperial title. They legitimised the election of John IX. They also solved the Formosan question and confirmed his rehabilitation. Most significantly for Lambert, however, they reaffirmed the Constitutio Romana of Lothair I (824), which required the imperial presence at papal elections. Lambert hereafter governed with the church and continued the policy of his father of renovatio regni Francorum: renewal of the Frankish kingdom. He was able to issue capitularies in the Frankish fashion as his father had done. In fact, he was the last ruler to do so. In 898, he legislated