This volume chronicles the development of philosophical conceptions of space from early antiquity through the medieval period to the early modern era, ending with Kant. The chapters describe the interactions between philosophy at different moments in history and various other disciplines, especially geometry, optics, and natural science more generally. Figures from the history of mathematics, science, and philosophy are discussed, including Euclid, Plato, Aristotle, Proclus, Ibn al-Haytham, Nicole Oresme, Kepler, Descartes, Newton, Leibniz, Berkeley, and Kant. A series of shorter essays, or Reflections, characterize perspectives on space found in the disciplines of ecology, mathematics, sculpture, neuroscience, cultural geography, art history, and the history of science.