[[Image:Proun24.jpg|right|frame|<center>[http://www.interpc.fr/mapage/westernlands/synchro.html El Lissitzky Proun 99 1924]</center>]] | [[Image:Proun24.jpg|right|frame|<center>[http://www.interpc.fr/mapage/westernlands/synchro.html El Lissitzky Proun 99 1924]</center>]] |