Freudenberg works, 1990

Fredenberg 'O' 1990, 

Travertine with copper sulphate

230 x 250 x 3 cm

Private Collection, Zürich

Freudenberg Bars, 1990,

Travertine with iron oxide

230 x 255 x 3cm

Private Collection, Zürich

Freudenberg Circle, 1990,

Travertine with ciment fondu and oxides

Private Collection, Zürich

Freundenberg Square, 1990

Travertine with ciment fondu and oxides

230 x 800 x 3 cm

Private Collection, Zürich