Ancient Roman and Greek architecture is renowned for its grandeur and innovation. The Greeks introduced the three classical orders: Doric, Ionic, and Corinthian, which defined the style of their temples and public buildings. Structures like the Parthenon in Athens exemplify their emphasis on symmetry and proportion. The Romans built upon Greek designs, incorporating arches, vaults, and concrete to create larger and more durable structures. Notable examples include the Colosseum and the Pantheon, which showcased their engineering prowess. Both cultures significantly influenced modern architecture, leaving a lasting legacy in design and construction techniques.