Columbia subject headings:
Friedrich, Caspar David, 1774-1840--Symbolism.
Rocks in art.
Romanticism--Germany.
Harvard subject headings:
Friedrich, Caspar David, 1774-1840--Symbolism.
Rocks in art.
Romanticism in art--Germany.
Princeton subject headings:
Friedrich, Caspar David, 1774-1840--Symbolism.
Rocks in art.
Romanticism--Germany.