Boshier became well-known for his Pop Art paintings in the early 1960s, but by 1965 had progressed to painting in the geometric style which is associated with Op Art. This shift in style came after the artist had spent a year in India and had become increasingly politically aware. `Plaza? is one of a series of paintings which explore the mechanics of perception by using bright and repeated geometric patterns. The painting uses two shaped canvases with the smaller attached to the front of the larger one with metal struts. The sculptural element of the work prefigured the artist?s move into sculpture shortly after this piece was made.