المساهمون: Paravicini Bagliani, Agostino., Toubert, Pierre.

مصطلحات موضوعية: Cities and towns, Medieval -- Italy., Guelfs and Ghibellines., History.

Subject Person: Frederick II, Holy Roman Emperor, 1194-1250.

جغرافية الموضوع: Italy -- History -- 13th century., Sicily (Italy) -- History -- 1194-1282.