Text in catalogue exhibition Wegwezen. Recreatie vroeger, nu en straks, Amsterdam, Amsterdams Historisch Museum, 1969

Ny Babylon in Architekten, n.d., 1969, p. 280-284

Ruimtelijke ordening of ruimtelijke chaos in Ruimte voor de mens, nº 1, Amersfoort, Werkgroep 2000, 1969, p. 4-6

About the meaning of construction in Data. Directions in Art, Theory and Aesthetics: An Anthology edited by Anthony Hill, London, Faber and Faber, 1968, pp. 175-179.

Text catalogue exhibition Van Cobra tot New Babylon, Haarlem, Galerie-T, 1968

Text catalogue of the exhibition Nya Babylon, Lund, Lunds Kunsthall, 1968

Lecture at Flemisch culture house, De Brakke Grond in Amsterdam on February 15th, 1967 on the invitation of Civitas Acedemica Amstelodamensis.

New Babylon. En verden for Homo Ludens et New Baby­lon - Et forslag (New Babylon. A World for Homo Ludens. A suggestion) in cat. of the exhibition Constant. New Babylon, Oslo, Kunstnernes Hus, 1967.

Omtrent New Babylon. Een briefwisseling met Luc Wenseleers (About New babylon. A correspondence with Luc Wenseleers) in Ruimten. Letterkundig interuniversitair tijdschrift, vol 6, nº 21/22, 1967, p. 75-88.

Text catalogue exhibition Constant. Von Cobra bis New Babylon, München, Galerie Heseler, 1967.

Traffic in towns in New Babylon Bulletin, nº 1, January 1967, p. 1-12.

Introduction for the Sociological Interacademiale at the university of Groningen on April 20th, 1966.

Lecture by Constant at the opening of the exhibition Constant. New Babylon at the Volkshochschule in Cologne in 1966.

En ny tid in Louisiana Revy, vol. 7, nº 1, 1966, p. 38-39.

Nieuw Urbanisme (New Urbanism) in Provo, nº 9, May 1966, p. 2-6.New Urbanism Buffalo, NY: Friends of Malatesta, 1970New Urbanism in Delta, vol. 10, nº 3, 1967, p. 54-61.Ny urbanisme in Arkitekt og billedkunst, n.d., 1969, p. 70-71

Lecture for the members of the BNA, the union of Dutch architects, at the finish of the new Schiphol (1966). Published in English: On travelling in Studio International, vol. 185, nº 955, May 1972, p. 228-229

Text catalogue exhibition Neue Tendenzen der Architektur, Bern, Kunsthalle, 1966. Or more probable: Licht und Bewegung / Kinetische Kunst/ Neue Tendenzen der Architektur, 30 July – 5 September 1965, Bern Kunsthalle

In De dialektiek van het experiment (The Dialectic of the Experiment) Constant looks back at the preceding period in his career and the radical transformation that took place in his artistic development during the 1950s. He declares that while he can visualize ‘unitary urbanism’, the present state of society is fundamentally different from the societal situation essential to the realization of such a revolutionary programme. Consequently, unitary urbanism remains limited to isolated experiments and a programme.

New Babylon: een schets voor een cultuur is an Dutch adaptation of an original German manuscript in collaboration with Caspari translated and adjusted by Constant. A summary of the Dutch text was published in 1974 in the exhibition catalogue at Gemeentemuseum Den Haag. Neither the original Dutch text of 125 pages nor the German manuscript of 165 pages was ever published as a whole until 2021.

Phantastische Architektur (Fantastical Architecture) in Speculum Artis. Zeitschrift für alte und neue Kunst, vol. 17, nº 4, April 1965, p. 17-22.