Deborah Epstein Solon has written:

'Colonies of American impressionism' -- subject(s): American Painting, Artist colonies, Exhibitions, Impressionism (Art), Painting, American

'An American Impressionist'

Ulrich W. Hiesinger has written:

'Impressionism in America' -- subject(s): American Painting, Exhibitions, Impressionism (Art), Painting, American, Ten American Painters (New York, N.Y.)

Of course Impressionism, since Post-Impressionism means after Impressionism.

Post Impressionism can be seen as a extension of Impressionism, but disregarding many of the limitations and certain concepts of Impressionism.

Impressionism is not a religion.