The De Stijl movement was founded in the Netherlands in 1917 with the goal of expressing universal concepts through simplified geometric forms, primary colors, and an emphasis on horizontals and verticals. Key characteristics included flat roofs, asymmetric designs, white or gray walls accented with primary colors in rectangular shapes. Furniture was designed as an extension of the architecture, using straight lines, planes, and geometric shapes. Decorative elements were limited, as the architecture itself was considered a work of art.