study for 'Labyrinthe', Arnhem 1991 - pencil sketch on paper and tracing paper 42,5 x 29 cm (detail)
study for 'Labyrinthe', 2018 - digital sketch
study for 'Labyrinthe', 1991 - ink on tracing paper 16 x 30 cm (detail)
Labyrinthe, 1992 - glass curtain, perspex 135 x 109 x 290 cm