Inside the dome, there is a spiral walkway just beside/under the dome roof (tourists can walk on it free-of-charge). In the middle, there is a  mirrow tower widening upwards, which through windows lead natural light into the big assembly hall. (I took the picture from the spiral walkway, the mirrors are on the upper side, the ceiling windows of the assembly hall on the lower side.)

The strong symbolism (the people above the politicians below, transparency) is of course intended. It is a work of British architect Norman Foster.

_{*Lunatic*, n.
One whose delusions are out of fashion.}