Is there such a thing as three-dimensional space? Is space inert or dynamic? Is the division of time into past, present and future real? Does the whole of time exist all at once? Does it progress smoothly or by discontinuous leaps? Simplicius surveys ideas about place and time from the preceding thousand years of Greek Philosophy and reveals the extraordinary ingenuity of the late Neoplatonist theories, which he regards as marking a substantial advance on all previous ideas.