Thomas Cole.
The Course of Empire I:
Savage State.
1836.
Oil on canvas.
New York City: New York Historical Society.

Thomas Cole.
The Course of Empire II:
The Pastoral or Arcadian State.
1836.
Oil on canvas.
New York City: New York Historical Society.

Thomas Cole.
The Course of Empire III:
The Consummation of Empire.
1835-36.
Oil on canvas.
New York City: New York Historical Society.

Thomas Cole.
The Course of Empire IV:
Destruction.
1836.
Oil on canvas.
New York City: New York Historical Society.

Thomas Cole.
The Course of Empire V:
Desolation.
1836.
Oil on canvas.
New York City: New York Historical Society.

Thomas Cole.
Notch of the White Mountains
(Crawford Notch).
1839.
Oil on canvas.
Washington, DC: National Gallery of Art.

George Inness.
Lackawanna Valley.
1855.
Oil on canvas.
Washington, DC: National Gallery of Art.