Columbia subject headings:
Harvard subject headings:
Arts, Medieval--Italy--Congresses.
Nature (Aesthetics)--Congresses
Princeton subject headings:
Art, Italian--Themes, motives--Congresses.
Art, Medieval--Italy--Themes, motives--Congresses.
Italian literature--To 1400--History and criticism--Congresses.
Nature (Aesthetics)--Congresses.
Nature in literature--Congresses.