Abstract: Window construction, intended to be placed in a door, panel or wall, in particular of so-called sandwich construction, the window construction comprising an outer part and an inner part, each composed of a window of transparent material, merging into a peripheral edge provided with means for fastening the outer or inner part, while annular coverings are present, separate from the peripheral edge and the window, in order to conceal the inside of the panel or the wall from view. Said annular coverings are each quadrilaterally symmetrical, but have mutually different dimensions, so that they can be slid into each other during fitting.