Curved lines also create motion, as well as a "graceful and delicate effect on a room." They are common in arches, drapery swags, rounded/curved furniture, rounded accessories, counters, fixtures, and other curved architectural treatments. There are four categories of curved lines, convex (upward), concave (downward), horizontal curves, and small curves, which are found in patterned rugs, etc. Here is a modern department store bistro in Germany that shows curved lines along the ceiling.
Contemporary Nordic architectural culture offers both exemplary approaches and significant constructed works addressing these challenging circumstances. The classic hallmarks of Nordic architecture simplified form, frugal use of materials and sensitive treatment of daylight and the natural setting embody the basic principles of responsible, sustainable architecture.