Complex sentence: Turin and Friuli, in the extreme west and east end respectively, seem to have been the most powerful, whereas the capital soon shifted from Verona to Pavia; also Monza was an important town in that time, more than ruined Milan.
Split into simpler sentences: Turin and Friuli, in the extreme west and east end respectively, seem to have been the most powerful, whereas the capital soon shifted from Verona to Pavia. Monza also was an important town in that time, more so than ruined Milan.