Appreciate the architectural discussion. Reminds me of an architectural feature of ceilings in ancient buildings. I cannot recall the name of it, but it did all

Appreciate the architectural discussion. Reminds me of an architectural feature of ceilings in ancient buildings. I cannot recall the name of it, but it did allow for cooling of the buildings. The design would consist of a lower ceiling with the middle gone. An upper ceiling would extend over this. The section between the ceilings would have openings to allow for light and ventilation. Wish I could remember the name of this design.