Oscar Bluemner, born Friedrich Julius Oskar Blümner and after 1933 known as Oscar Florianus Bluemner, was a Prussian-born American Modernist painter.

American modernism, much like the modernism movement in general, is a trend of philosophical thought arising from the widespread changes in culture and society in the age of modernity. American modernism is an artistic and cultural movement in the United States beginning at the turn of the 20th century, with a core period between World War I and World War II. Like its European counterpart, American modernism stemmed from a rejection of Enlightenment thinking, seeking to better represent reality in a new, more industrialized world.