They are ideas that come to life on the interior walls of buildings. They are executed by teams of artists who follow LeWitt's meticulous plans, detailed instructions to draw certain types of lines at specified spacing, length, color and thickness,
or to smoosh watery inks in geometric layouts,
or they project the image of curvy lines in order to enlarge it to wall-size.
The wall drawings are truly beautiful. (Did I say that before?) And they are impermanent. They exist for the duration of the exhibition, then (gasp), they are painted over. Happily, this exhibition will remain in place until 2033.
Yale University, MASSMoca, and Williams College have created the largest ever show of Sol Lewitt wall drawings in a recently acquired mill building in Boston. It is truly wonderful. Go and see it!!