the popes, Manuel was never honoured with the title of augustus by the popes. And although he twice sent embassies to Pope Alexander III (in 1167 and 1169) offering to reunite the Greek and Latin churches, Alexander refused, under pretext of the troubles that would follow union. The final results of the Italian campaign were limited in terms of the advantages gained by the Empire. The city of Ancona became a Byzantine base in Italy, accepting Manuel as sovereign. The Normans of Sicily had been damaged and now came to terms with the Empire, ensuring peace for the rest of Manuel's reign. The Empire's ability to get involved in Italian affairs had been demonstrated. However, given the enormous quantities of gold which had been lavished on the project, it also demonstrated the limits of what money and diplomacy alone could achieve. The expense of Manuel's involvement in Italy must have cost the treasury a great deal (probably more than 2.16 million hyperpyra or 30,000 pounds of gold), and yet it produced only limited solid gains. Byzantine policy in Italy after 1158 After 1158, under the new conditions, the aims of the Byzantine policy changed. Manuel now decided to oppose the objective of the Hohenstaufen dynasty to directly annex Italy, which Frederick believed should acknowledge his power. When the war between Frederick Barbarossa and the northern Italian communes started, Manuel actively supported the Lombard League with money subsidies, agents, and, occasionally, troops. The walls of Milan, demolished by the Germans, were restored with Manuel's aid. Ancona remained important as a centre of Byzantine influence in Italy. The Anconitans made a voluntary submission to Manuel, and the Byzantines maintained representatives in the city. Frederick's defeat at the Battle of Legnano, on 29 May 1176, seemed rather to improve Manuel's position in Italy. According to Kinnamos, Cremona, Pavia and a number of other "Ligurian" cities went over to Manuel; his relations were also particularly favourable in regard to Genoa and Pisa, but not to Venice. In March 1171 Manuel had suddenly broken with Venice, ordering all 20,000 Venetians on imperial territory to be arrested and their property confiscated. Venice, incensed, sent a fleet of 120 ships against Byzantium. Due to an epidemic, and pursued by 150 Byzantine ships, the fleet was forced to return without great success. In all probability, friendly relations between Byzantium and Venice were not restored in Manuel's lifetime. Balkan