Quote from Van Doesburg's unpublished writing, 'Fundamental principles', 1930; as cited in Theo van Doesburg, Joost Baljeu, Studio Vista, London 1974, p. 203 
1926 – 1931
                                    
“Marinetti's [leading Futurism founder and theorist] Tactilism can be seen as an instinctive effort in this direction [of the new architecture, according to Van Doesburg] even if it presents only the sensuous-tactile expression of space through using various materials. Picasso's earlier compositions in various materials also concerns us here. The Russian artists [ Tatlin and Lissitzky, both Constructivist artists] also appreciated the exterior quality of the plane, not only optical, but also in a tactile manner... Intuition already produced a foreknowledge of these new realms, but they can be established fully only by science.”
            Quote in van Doesburg's unpublished writing: 'The struggle for the new', 1929-30; as quoted in Theo van Doesburg, Joost Baljeu, Studio Vista, London 1974, p. 187 
Van Doesburg's quote is proposing here the sensuous-tactile expression of space as essential for modern architecture 
1926 – 1931
        
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Theo van Doesburg 46
Dutch architect, painter, draughtsman and writer 1883–1931Related quotes
                                        
                                        Quote in van Doesburg's article: 'Space – time and colour' in 'De Stijl', Aubette Issue, series xv, 87-9, 1928, pp. 26–27 
1926 – 1931
                                    
                                        
                                        Quote, May 1924; from Tatlin's lecture on 'Material Culture and Its Role in the Production of Life in the USSR'; as quoted by Larissa A. Zhadova, ed., Tatlin, trans. Paul Filotas et al; Thames and Hudson, London, 1988, p. 252 
In May 1924, right in the middle of N.E.P., Tatlin offered his synoptic statement of what was still the task of material culture 
Quotes, 1910 - 1925
                                    
                                        
                                        Quoted from a biographical note written by Tatlin in 1929, published in Tatlin', Weingarten; Kunstverlag Weingarten, 1987), p. 328; as quoted by Vasilii Rakitin, in The great Utopia - The Russian and Soviet Avant-Garde, 1915-1932; Guggenheim Museum, New York, 1992, p. 34 
Quotes, 1926 - 1954
                                    
                                        
                                        Quote of Theo van Doesburg, in Architecture and revolution — Revolutionary architecture? Utopian designs by Tatlin, Lissitzky, and others, Theo van Doesburg, in 'Het Bouwbedrijf' (1928) 
1926 – 1931
                                    
                                        
                                        Quote 
Source:  Famous phrase of Eugenio Cruz Vargas http://www.angelred.com/urls/arte.htm| 
Source:  Sky  http://viaf.org/viaf/13641853/| 
Source:  From Library of Congress Name Authority File of U.S.A. http://id.loc.gov/authorities/names/n81126660.html|
                                    
                                        
                                        Quote from: 'Basic Premises' 
1926 - 1941, Rußland: Die Rekonstruktion der Architektur in der Sowjetunion' (1929)
                                    
                                        
                                        Quote from his unpublished writing, 'Fundamental principles', 1930; as cited in Theo van Doesburg, Joost Baljeu, Studio Vista, London 1974, p. 203 
1926 – 1931