Ambiance d'une ville future (1958), photographed by Jan Versnel in 1958.

One of the first models of Constant which is transformed in the model "Construction in orange", 1958.

Detail of Gele sector (1958), photographed by Bram Wisman in 1958.

Detail of Gele Sector (1958), photographed by Bram Wisman. 

Detail of Gele sector (1958), photographed by Jan Versnel in 1958. 

Sector constructie (1958-1961), photographed by Bram Wisman in 1958.

For some models—including this one—the year of production is a period, either because it is an estimation or because adjustments were made to the model later on. 

Photo of Constant with his daughters Eva and Martha at Artis, Amsterdam ca 1957.                                                                        

NB: We do not have a version fit for print of this image

Congres du mouvement pour un Bauhau imaginistes, Alba 1956.
F.l.t.r. Wolman, Jorn, Constant, E. Verone, Gallizio, Sotsass, Piero Simondo.

Constant with his family in Milan, 1956.
F.l.t.r: Eva, Victor, Constant's second wife, Nellie Riemens, and Constant.

NB: Not available in high res!

Fltr: Ettore Sottsas, Gil Wolman, Elena Verona, Asger Jorn and Constant at restaurant Bruno during the congress Mouvement pour un Bauhaus imaginiste in Alba 1956.

Alba, 1956