Arch or Radius windows have a bottom half that is rectangular and a top half that is an arch or half-circle. Arch windows are a great addition to a room to bring in softness and contrast. Arch windows can be operable (where they open) or just let in light (fixed).
Grids can be added to arch windows to enhance the design. Grids divide the window into smaller panes and are available for both exterior and interior placement.