Sol LeWitt explored geometric forms and lines in paintings, drawings, sculptures, and prints. For this commission, a series of simple, abstract shapes are presented on the mezzanine wall. Are they transit symbols? The shape of ticket punches? References to architectural forms? We may never know — and there may not be an answer. According to Lewitt, "Artists are mystics rather than rationalists. They leap to conclusions that logic cannot reach."
Thirteen Geometric Figures was commissioned in 1984 as part of an initiative for public art projects to be included in Pittsburgh's Downtown T stations.
Sol LeWitt (1928-2007) was a key figure in the Conceptualism art movement, as he considered the idea behind the art to be the most important aspect of the work. LeWitt is known for his three-dimensial geometric shapes and his wall drawings. He often worked with ideas of sequence and space. The viewer is left to derive a meaning of the work with imagination.