Abstract: This architectural assembly includes a wall, and a structure supported on the wall over a top portion of the opening. The structure has a light transmission portion permitting light from the opening to pass therethrough. The structure comprises a lower and an upper frame structures. A transparent or translucent, preferably stained-glass, panel is secured between the cornice members using a silicone or other adhesive material. The upper and lower frame structures each have a groove therein facing the groove of the other that receives the adhesive and the glass. A top panel cover structure covers the upper frame stucture. A method for efficiently manufacturing the structure is also provided.