Unless you live under a rock, you won't find any houses that don't have windows. They give light to the interior of houses and let in hot and cool air if the room temperature calls for it, all the while not having to worry about bugs getting in (as long as you have a screen). But while windows help control room temperature, they also do an excellent job of increasing the houses’ curb appeal. No matter what kind of structure it is, be it a house or an office, the window design tends to help compliment or clash with the design. Whether you're looking for a new home and are picky about the little details, you're an architect and need ideas for your windows, or you're just plain curious, here are a few popular window designs you may not know about.