Anne Tyng (born 1920) explores the potentials of geometry through her architectural and teaching practices. Since the 1950s, when she worked closely with Louis Kahn and independently pioneered space-frame construction, Tyng has applied natural and numeric systems to built forms on all scales, from urban plans to domestic spaces. She believes that geometry is a metaphor for thought and the creative process--as a spatial demonstration of how the mind generates associations through the combination of pattern and chance. This volume documents a new project by the visionary architect and theorist. Commissioned by the Institute of Contemporary Art Philadelphia, Tyng has created an installation-scale model that realizes the ambition of all of her work: to inhabit geometry. Exploring her life-long fascination with the Platonic solids, the book also features related models and documentation of past projects, including Tyng and Kahn's never-built design for City Tower in Philadelphia (1952-1956).