Gothic cathedrals
The Depressed arch is wide and looks as if it has been pushed almost flat. When arches like this are used to make great big windows they need to be supported by many tall thin vertical shafts and horizontal transoms, so that the window looks as if it has been divided up into a grid (lots of rectangles). This sort of decoration is used on walls as well. In England the style is called Perpendicular Gothic style.