Until 27 April 2003. A large site-specific wall drawing and recent gouaches.

The American conceptualist has done it again: the walls of the gallery are covered in big, bold trompe d’oeil – black, greys and white, which give you the illusion that you stand inside raw architecture. The lattice of beams and their calm assurance remind you of the spirit of majestic Egypt. As usual LeWitt has painstakingly made the plans for this work, but has had it executed by his helpers.

In a side room there are some large pieces of paper painted by his own hand, in a loose, craftsmanlike way. Each gouache is a dense fabric of snaky lines in two opposite colours: eggplant purple against bottle green, for instance. The play of pleasant contrasting hues makes for a startling Op Art effect, and the meandering lines seem to signify a new relaxing of LeWitt’s more severe and organised wall-covering manner. Review by Edith Schloss