The hard stuff: Why concrete is still best for stunning architecture

Water, aggregate, cement. Mix them together, and you produce concrete – usually the most banal of building materials, not even as characterful or satisfying to touch as a well-fired brick. But when concrete is used by brilliant architects and engineers, the results are riveting. Even today, the world’s first iconic concrete structure, the unreinforced 43.4m dome of the Pantheon in Rome, completed in AD128, still seems breathtaking in its daring and beauty.