Columbia subject headings:
Architecture, Medieval--Europe--Congresses.
Art and state--Europe--Congresses.
Art patronage--Europe--Congresses.
Art, European--Congresses.
Art, Medieval--Europe--Congresses.
Frederick II, Holy Roman Emperor, 1194-1250--Art patronage--Congresses.
Holy Roman Empire--History--Frederick II, 1215-1250--Congresses.
Harvard subject headings:
Princeton subject headings:
Architecture, Medieval--Europe--Congresses.
Art and state--Europe--Congresses.
Art patronage--Europe--Congresses.
Art, European--Congresses.
Art, Medieval--Europe--Congresses.
Frederick II, Holy Roman Emperor, 1194-1250--Art patronage--Congresses.
Holy Roman Empire--History--Frederick II, 1215-1250--Congresses.