Ladies of Avignon
Pablo Picasso's Les Demoiselles d'Avignon (Oil on canvass, 1907), on display at the Museum of Modern Art, New York.
The painting, the subjects of which were five nude prostitutes of a brothel in Barcelona, was initially regarded as scandalous and was only exhibited in 1916. It is considered to be "seminal to the development of cubism and modern art." 
May 23, 2010