I get where youre coming from Eloah, the thing is just that we have never seen any historical evidence for such brick ceilings ever. The closest would be the castles with cross beams of wood with tiles, but even those cross beams were the main support.

Just from a plain physics perspective this is undoubtedly the hardest way to make a weak as all hell ceiling. Arching it would make up for it. Any point on this brickwork is a weakpoint, the force will be applied to a single brick, breaking the whole construction.
I have yet to see any make anything similar to this.