Art Nouveau and Art Deco were groundbreaking design movements that shook up the late 19th and early 20th centuries. These styles broke free from historical revivals, embracing nature-inspired forms and modern geometry to create fresh aesthetics in architecture and decorative arts. Both movements reflected the changing world around them, showcasing innovation and creativity. Art Nouveau's flowing lines and organic shapes contrasted with Art Deco's sleek geometry and luxurious materials, each leaving a lasting mark on design and architecture.