 In June 1926 , Lissitzky left the country again , this time for a brief stay in Germany and the Netherlands . There he designed an exhibition room for the Internationale <unk> art show in Dresden and the Raum <unk> Kunst ( Room for constructivist art ) and <unk> Kabinett shows in Hanover , and perfected the 1925 Wolkenbügel concept in collaboration with Mart Stam . In his autobiography ( written in June 1941 , and later edited and released by his wife ) , Lissitzky wrote , " 1926 . My most important work as an artist begins : the creation of exhibitions . " 
