F.l.t.r: Constant, Else Alfelt (Høst), Nelly Riemens and Karel Appel at Constant's home at the Henri Polaklaan 25, Amsterdam, November 1949.

Cobra exhibition in Stedelijk Museum Amsterdam, November 1949. Experimental artists entering the museum with their work, November 3, 1949.
F.l.t..r: Constant with his son Victor (carrying Constant's painting Masque/Masker, 1949), Eugène Brands, Tonie Sluyter (Appel's girlfriend), Anton Rooskens, Karel Appel, Jacques Doucet, Gerrit Kouwenaar, Theo Wolvecamp, Lucebert and Jan Elburg.

Le Barricade at the entrance of the Cobra exhibition, Internationale Tentoonstelling van Experimentele Kunst at the Stedelijk Museum Amsterdam from 03-28 November 1949. Constant painted this very large painting of 372 by 300 cm on location just before the opening of the exhibition. Eugene Brands and Karel Appel also painted large scale paintings on location, specially for the exhibition.

Mural by Constant and Karel Appel at Constant's home at the Henri Polaklaan 25, 1949. The mural doesn't exist anymore.

Mural by Karel Appel and Constant in Constant's home at the Henri Polaklaan 25 in Amsterdam. The mural does not exist anymore.
Constant wrote below the photo: Décoration de la maison de Constant, Henri Polaklaan 25, Amsterdam-detail Appel et Constant, nov 1949-1 maintenant détruit

Mural by Karel Appel with signatures of Constant, Corneille and Appel above the door in the house of ceramist and trout breeder Erik Nyholm in Funder, Jutland, Denmark.
The signature reads: 30 november 1949 Constant, Corneille, Appel.
Only the ceiling painting has been preserved. [Source: Marcel Hummeling, 2002]

Murals by Constant and Corneille in the house of ceramist and trout breeder Erik Nyholm in Funder, Jutland, Denmark, November 30, 1949. 

Murals by Constant and Corneille in the house of ceramist and trout breeder, Erik Nijholm, in Funder, Jutland, Denmark, November 30, 1949. Back wall by Corneille, right wall by Constant.

Murals (and ceiling) painted by Constant in the house of ceramist and trout breeder Erik Nyholm in Funder, Jutland, Denmark, November 30, 1949.