Brancusi (Romanian sculptor): Bird in Space (1928 version; bronze, limestone and wood). Museum of Modern Art, New York. See also: http://www.pinterest.com/pin/533958099544532902/
Brancusi. "They are imbeciles who call my work abstract. That which they call abstract is the most realistic, because what is real is not the exterior but the idea, the essence of things." (Constantin Brancusi)
“Some idiots call my work abstract, in spite of the fact that what they call abstract is actually the most real of all — not the outer appearance, but the concept or essence of things”--Constantin Brancusi.