Constant with his painting Concentratiekamp (1951) outside his studio at the Henri Polaklaan 25, Amsterdam, circa 1951.

Constant with his painting De oorlog (1950) outside his studio at the Henri Polaklaan 25, Amsterdam, circa 1951.

Constant with his painting De oorlog (1950) outside his studio at the Henri Polaklaan 25, Amsterdam, circa 1951.

Constant with his painting Verschroeide aarde III (1951) outside his studio at the Henri Polaklaan 25, Amsterdam, circa 1951.

Constant with his painting Verschroeide aarde [III] (1951) outside his studio at the Henri Polaklaan 25, Amsterdam, circa 1951.

Constant with his painting Verschroeide aarde [II] (1951) outside his studio at the Henri Polaklaan 25, Amsterdam, circa 1951.

Constant with his painting Verschroeide aarde [I] (1951) outside his studio at the Henri Polaklaan 25, Amsterdam, circa 1951.

Onknown object, presumably in Constant's studio at the Henri Polaklaan 25, Amsterdam, circa 1951.

Dotremont at his place Rue de la Paille, Bruxelles, 1950. On the wall a work by Constant, 1948.

f.l.t.r.: Tony Sluiter and Aldo van Eyck carrying Constant's painting "L'animal sorcier".

Installation of room 6 of the Internationale Tentoonstelling van Experimentele Kunst by Aldo van Eyk at the Stedelijk Museum Amsterdam in 1949. Aldo van Eyk was designer of the exhibition. Paintings on the wall by Karel Appel.