SAN FRANCISCO, CA.- The San Francisco Museum of Modern Art (SFMOMA) recently announced the acquisition of Wall Grid (3 x 3) (1966), an important early work by Sol LeWitt, one of the key artists of the postwar period. Wall Grid (3 x 3) was purchased through the Phyllis C. Wattis Fund for Major Accessions. Melding form and idea, LeWitt’s works are organized around principles set by the artist establishing procedures, materials, and boundaries that structure the work of art. By subtly shifting his own rules within each work, LeWitt invites viewers to explore the psychology and the flexibility of vision. LeWitt worked in a wide array of materials and mediums but is probably best known for what he called the “wall drawings,” works executed directly on walls at an architectural scale, which he initiated in the fall of 1968 with pencil drawings and later created with crayon, india ink, and acrylic paint. From 1964 to 1968