A rotational symmetry square design plan typically refers to a design or layout that exhibits rotational symmetry, where the design remains unchanged after being rotated by certain degrees. This concept is commonly found in art, architecture, and graphic design. Rotational symmetry is often achieved by creating patterns or shapes that have a central point of symmetry from which they can be rotated around. In architectural design, such a plan could be used for the layout of public spaces, squares, or gardens, where the symmetry creates a harmonious and balanced environment.