Columbia subject headings:
Heroes in art--Congresses.
Heroes in literature--Congresses.
Heroes--Greece--Congresses.
Mythology, Greek--Congresses.
Harvard subject headings:
Greece--Civilization--To 146 B.C.--Congresses.
Hero worship--Greece--History--Congresses.
Heroes--Greece--History--Congresses.
Princeton subject headings:
Heroes in art--Congresses.
Heroes in literature--Congresses.
Heroes--Greece--Congresses.
Mythology, Greek--Congresses.