Example image of eyePlorer eyePlorer map for 'Guelphs and Ghibellines': Holy Roman Emperor Italy Political faction Pope Investiture Controversy Bavaria Henry the Lion House of Welf Italian language Welf II, Duke of Bavaria Conrad III of Germany House of Hohenstaufen Swabia Waiblingen Weinsberg Frederick I, Holy Roman Emperor Lombard League Medieval commune Battle of Legnano Holy Roman Empire Papal States Battle of Montaperti Florence Siena Genoa Pisa Guild Rione Interdict (Roman Catholic Church) Otto IV, Holy Roman Emperor Philip of Swabia Frederick II, Holy Roman Emperor Crusader states Sixth Crusade Syria Charles I of Naples Conrad IV of Germany Manfred of Sicily Conradin Forlì Romagna Battle of Campaldino Pope Boniface VIII Dante Alighieri Excommunication Henry VII, Holy Roman Emperor Pope Benedict XII Golden Ambrosian Republic Milan House of Borromeo