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.
Documentation
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Hein van Haren, Constant, Peter Clough and André Volten
fltr: Hein van Haren, Constant, Peter Clough, André Volten and Shamai Haber (seen from the back) in Constant's studio Wittenburg.
ca 1965
NB: We do not have a version fit for print of this image

Jan v Goethem, Roosje and Machteld Roede
fltr: Jan v Goethem, Roosje and Machteld Roede at the Evoluon park design exhibition at Van Abbe Museum Eindhoven.
NB: We do not have a version fit for print of this image.

Jean Leering opening speech
Jean Leering opening the exhbition of the Evoluon park design at Van Abbe Museum Eindhoven.
NB: We do not have a version fit for print of this image.

Johnny Jacobs, Louis Kalff and Jean Leering
fltr: Johnny Jacobs, Louis kalff and Jean Leering at the Evoluon park design exhibition at Van Abbe Museum Eindhoven.
NB: We do not have a version fit for print of this image.

Louis Kalff, Jean Leering, André Volten and Constant
fltr: Louis Kalff, die in 1961 bij Philips de leiding en uitvoering van het Evoluon kreeg; Jean Leering, directeur van Abbemuseum; André Volten en Constant op de tentoonstelling in 1965 van het Evoluon park ontwerp in het Van Abbemuseum, Eindhoven.
NB: We do not have a version fit for print of this image.

Louis Kalff, Jean Leering, André Volten and Constant
fltr: Louis Kalff, Jean Leering, Johnny Jacobs (seen from the back), in the background Jan van Goethem, André Volten and Constant at the Evoluon park design exhibition at Van Abbe Museum Eindhoven.
NB: We do not have a version fit for print of this image.

New Babylon exhibition Dominicanerkerk Maastricht, 1965.
At the New Babylon exhibition in the Dominicanerkerk Maastricht, 1965.
NB: We do not have a version fit for print of this image.

New Babylon: een schets voor een cultuur | Skizze zu ein Kultur
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. Neither the original Dutch text of 125 pages nor the German manuscript of 165 pages was ever published as a whole. A summary of the Dutch text was published in 1974 in the exhibition catalogue at Gemeentemuseum Den Haag. The original texts are at the RKD Archief Constant, they can be found under the following numbers:Dutch version 414[b] and German version 414[a]).

Nic Tummers, Constant and Nel in the Dominicanerkerk, 1965
At the New Babylon exhibition in the Dominicanerkerk Maastricht, 1965.
NB: We do not have a version fit for print of this image.