Complex sentence: After a short period in which Charles, Duke of Guelders was finally adopted as Lord, Charles V annexed the city and its region to his empire, Charles has appealed to the old rights of the bishop of Utrecht.
Split into simpler sentences: After a short period in which Charles, Duke of Guelders was finally adopted as Lord, Charles V annexed the city and its region to his empire. Charles appealed to the old rights of the bishop of Utrecht.