Neoclassical and Beaux-Arts architecture emerged in the mid-18th century, drawing inspiration from ancient Greek and Roman designs. These styles emphasized symmetry, proportion, and geometric forms, creating grand, monumental structures that conveyed power and civic pride. Key features included classical elements like columns and pediments, hierarchical space arrangements, and simplified decorative schemes. The movement spread throughout Europe and the United States, becoming the dominant style for public buildings and institutions in the Western world.