File talk:Black Square.jpg
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On this page it is written that Black Square is dated 1913. The correct date is 1915 (or circa 1915).
"The Black Square of Kazimir Malevich is one of the most famous creations of Russian art in the last century. The first Black Square was painted in 1915 to become the turning point in the development of Russian avant-garde. Black Square against white background became the symbol, the basic element in the system of the art of suprematism, the step into the new art. The artist himself created several variants of the Black Square. All four Squares painted by Malevich from 1915 to the early 1930s developed the same idea." Source.
See too MoMA, Suprematism Coldcreation (talk) 17:27, 22 April 2012 (UTC)