Le guerre del Barbarossa i comuni contro l'imperatore - Grillo, Paolo 1968- (Laterza, 2014)
Keywords: Frederick / I / Holy Roman Emperor / approximately 1123-1190; Friedrich -- I. -- Heiliges Römisches Reich, Kaiser -- 1122-1190; Geschichte; Krieg; Italien; Holy Roman Empire / History / Frederick I, 1152-1190; Italy / History / 476-1492