what was his ethnicity?
He is Polish.
Kazimir Malevich
Malevich's family was one of the millions of Poles who lived within the Russian Empire following the Partitions of Poland. 
who is el lissitzky? He was a Russian artist, designer, photographer, typographer, polemicist and architect. where was he born? Pochinok, southeast of Smolensk, former Russian Empire can you name any of his creations? He proposed and developed the idea of horizontal skyscrapers does his style have a name? Yes, Proun could you please elaborate on this? It was essentially his exploration of the visual language of suprematism with spatial elements, utilizing shifting axes and multiple perspectives; both uncommon ideas in suprematism. what is that particular visual language that you just mentioned? suprematism can you mention a few people who followed this? Kazimir Malevich has he been represented in media? His work is featured prominently in the Lars von Trier film, "Melancholia". where was this person born? Kyiv in Kiev Governorate of the Russian Empire is there any famous work by him? Red Square
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Kazimir Malevich [SEP] Polish ethnicity
Malevich's family was one of the millions of Poles who lived within the Russian Empire following the Partitions of Poland. Kazimir Malevich was born near Kyiv on lands that had previously been part of the Polish–Lithuanian Commonwealth of parents who were ethnic Poles. Both Polish and Russian were native languages of Malevich, who would sign his artwork in the Polish form of his name as "Kazimierz Malewicz". In a visa application to travel to France, Malewicz claimed "Polish" as his nationality. French art historian Andrei Nakov, who re-established Malevich's birth year as 1879 (and not 1878), has argued for restoration of the Polish spelling of Malevich's name.