Round, or otherwise circular windows serve to compliment either the style of your home or the addition of other windows. They are most common on higher points of two story or larger homes to give to look of a quaint or Victorian / Gothic feel. Half round windows are very common towards the top of homes, perhaps most commonly along the home exterior towards the attic. Round or Half round windows are almost always fixed windows with no moving parts and the inability to open and close. Nevertheless, they provide an excellent source of natural light from a vantage point that many other windows cannot.