Classical architecture refers to the architectural style that originated in ancient Greece and Rome. It is characterized by its use of columns, symmetry, and proportion. Key elements include the Doric, Ionic, and Corinthian orders of columns, which each have distinct designs. Classical buildings often feature grand structures like temples, theaters, and public spaces. This architectural style emphasizes harmony and balance, reflecting the ideals of beauty and order in ancient cultures. Many modern buildings draw inspiration from classical architecture, incorporating elements such as pediments, arches, and domes. Notable examples include the Parthenon in Athens and the Pantheon in Rome.