Room to think
The roof of the building has a central opening with a mirror funnel on top of it. With this design the light always comes down in the middle of the building and spreads out among the pillars in every direction.
In half of the building, opposite the entrances, there is water running down to the middle, creating a reflection of the sun light from the opening in the ceiling, that you can follow when you walk down in the building, and a water mirror in the center of the building.
