Selected Bibliography Architecture - Form Space and Order | Page 54

C I RC L E Plan of the Ideal City of Sforzinda, 1464, Antonio Filarete neutral Compositions of circles and circular segments stable unstable equilibrium stable self-centered dynamic fixed in place The circle is a centralized, introverted figure that is normally stable and self-centering in its environment. Placing a circle in the center of a field reinforces its inherent centrality. Associating it with straight or angular forms or placing an element along its circumference, however, can induce in the circle an apparent rotary motion. Roman Theater according to Vitruvius FORM / 3 9