Columbia subject headings:
Frederick II, Holy Roman Emperor, 1194-1250--In literature.
Giorgio, di Gallipoli, active 13th century--Criticism and interpretation.
Harvard subject headings:
Frederick II, Holy Roman Emperor, 1194-1250--In literature.
Giorgio, di Gallipoli, active 13th century--Criticism and interpretation.
Princeton subject headings:
Frederick II, Holy Roman Emperor, 1194-1250--In literature.
Giorgio, di Gallipoli, active 13th century--Criticism and interpretation.