Yes, let us not forget that most of these buildings were designed to impress, and in some way make visitors feel inferior the second they set foot into the entrance hall. It was a physiological thing.
Imagine being summoned into the royal presence at the palace of Versailles, or the Winter Palace. Having to walk down the Rastrelli Gallery, up the Jordan staircase etc.
I would be a quivering wreck by the time I ended up in the royal presence. All the grand rooms you were made to traverse before you arrived at your destination.
A bit different at the Alexander Palace, you went in the "back door' so to speak, via a very ostentatious entrance hall and down a dark passage.
Did anyone ever enter via the "front door, ie the Doors entering the semicircular hall ?