Looking skywards from the lower level to the central dome in the QVB Sydney as well as to other features.

In the Queen Victoria Building, Sydney, it is possible Umberto Eco could ponder on mystery and post-modernism in this escallating maze worthy of his book The Name of the Rose. And there is more trivia.
Another work by Eco is Foucault's Pendulum. An apparatus, with the same name, is used to demonstrate the rotation of the earth and one such apparatus was installed from the central dome in this same building. A bob or weight was allowed to swing suspended by wire from the top right down to the floor thru the galleries. (Leon Faucault first demonstrated this at the Pantheon in Paris according to Wikipedia.)