Short answers, pulled from the story.
Kazimir Severinovich Malevich was born on the 11th of February 1879 in Kiev, a city that now belongs to Ukraine. His parents were ethnic Poles who had fled their homeland after the failed January Uprising of 1863 against Russian rule.
Malevich published his manifesto From Cubism to Suprematism in 1915 when he laid down the foundations of Suprematism. He exhibited his first Black Square at the Last Futurist Exhibition 0,10 in Petrograd that same year.
Malevich died of cancer in Leningrad on the 15th of May 1935. An apartment block was built on the place of the tomb and burial site of Kazimir Malevich in 2013 after the original memorial was destroyed during World War II.
In a 1926 visa application to travel to France, Malewicz claimed Polish as his nationality while a secret police file from Malevich's arrest on the 20th of September 1930 indicates that he declared his nationality as Ukrainian. The consensus among art historians remains that the question concerning his identity has not been solved.
One of these works entitled Suprematist Composition from 1916 sold again at Christie's New York in May 2018 for over US$85 million. This sale set the world record for any Russian work of art following its previous sale at Sotheby's in November 2008 for just over US$60 million.