[jazzyjackson]

If you click the '+' to enhance you can make out what looks like bells that appear to have a pendulum underneath them, and the length of each line seems to follow a harmonic series so it must be some kind of musical alarm chime but I've never seen anything like it :)

Can we also talk about how the vaulted ceiling has a similar, but altered motif as the floor? Really talented stuff!

[gorgoiler]

Each bell summons a servant to a particular room.

The pendulum mechanism is on each bell. It is activated by the bell ring, and left swinging to indicate which bell or bells rang.

[jazzyjackson]

Ah, thank you! I couldn't conjure a reason you would need a pendulum on a bell, that makes sense.

[teruakohatu]

You are right about the floor/ceiling. Very impressive.