Columbia subject headings:
Architecture, Medieval--Holy Roman Empire.
Art, Medieval--Holy Roman Empire.
Frederick II, Holy Roman Emperor, 1194-1250.
Holy Roman Empire--Intellectual life.
Harvard subject headings:
Architecture, Medieval--Italy, Southern--Congresses.
Art, Medieval--Italy, Southern--Congresses.
Frederick II, Holy Roman Emperor, 1194-1250--Art patronage--Congresses.
Holy Roman Empire--Intellectual life--Congresses.
Italy, Southern--Intellectual life--Congresses.
Princeton subject headings:
Frederick II, Holy Roman Emperor, 1194-1250--Congresses.
Holy Roman Empire--Intellectual life--Congresses.
Italy--Intellectual life--To 1268--Congresses.