Constant and Piet Clement, 1963.
Nicolas Schöffer visting Constant at Constant's new studio Wittenburg, 1963.
The year is a rough estimate. Constant playing the guitar in his studio at the Henri Polaklaan 25 Amsterdam amidst of constructions and models.
Constant with parrot at his studio surrounded by Infinite Line and Nébulose Mécanique, 1962.
Christian Dotremont and Constant at the entrance of Museum Tervuren.