Of God and His Creatures

Matter (in motion), time, and place all began together. Place (topos) to the schoolmen and Aristotle is the shell of space (chôra) marking the outline of a body. If the body were suddenly annihilated, all but the indefinitely thin film of its outer surfaces, that film would mark the place which the body had occupied. In motion, bodies do not carry their place with them, but go from place to place. This conception of place is to be borne in mind in reading the words that follow immediately in St Thomas.

Of God and His Creatures: 2.32