Columbia subject headings:
Arts--Themes, motives--Congresses.
Civilization--Greek influences--Congresses.
Heroes--Mythology--Greece--Congresses.
Mythology, Greek, in art--Congresses.
Mythology, Greek, in literature--Congresses.
Mythology, Greek, in music--Congresses.
Mythology, Greek, in opera--Congresses.
Harvard subject headings:
Heroes in art--Congresses.
Heroes in literature--Congresses.
Mythology, Greek--Influence--Congresses.
Princeton subject headings: