>The Pantheon stands for a millennium, but 30-year-old concrete crumbling? It took the wealth of a civilization to produce the Pantheon. We could make more du

>The Pantheon stands for a millennium, but 30-year-old concrete crumbling? It took the wealth of a civilization to produce the Pantheon. We could make more durable buildings if we used stone, too, but do you really want to pay $10m for a house?