The document discusses the functions and classification of squares. It states that squares serve as gathering places for community and provide shelter from traffic. The physical and psychological functions do not depend on size. Squares are classified as closed, dominated, nuclear, grouped, or amorphous based on their spatial configuration and surrounding buildings. Closed squares have complete enclosure by buildings, while dominated squares feature a focal building. Nuclear squares center around a strong vertical element, and grouped squares combine individual spaces organically. Amorphous squares lack a specific shape.