Iron, steel, and later aluminum became widely used in building and furnishing interiors, thanks to industrial innovations. The ability to mass-produce plate glass allowed for larger windows, transforming the amount of light and sense of space within a room. The introduction of wallpapers, linoleum flooring, and synthetic dyes added variety and vibrancy to interior spaces that were previously unimaginable. This revolution in materials not only altered the aesthetics of interiors but also enhanced functionality, safety, and cleanliness. Homeowners could now choose durable, easy-to-maintain furnishings and finishes perfectly suited to the demands of urban life.