Just as we gained a uniform, mathematical time, so also we gained a uniform, mathematical space. The change is evident in the evolution of the artist's techniques. Before the development of linear perspective during the Renaissance, space did not present itself to the artist independently of things; it was more like the qualitatively varying presence of things, and derived its local shape from them. This plastic quality of space, evident in so many medieval paintings, typically appears highly confused to us.—Steve Talbott, TECHNOLOGY, ALIENATION, AND FREEDOM

When I developed a hypothesis whereby two people look at an object, a measurement of its its apparent size to each person will vary, someone said, “That’s architecture.”