Possible reference for Rosettes page

[Jorge_Stolfi]

If you look closely at the top central "wheel" at the Rosettes page, you will see something like a "clock hand" pointing down:

That rosette may indeed have been related to a sundial.  But my interpretation of the "clock hand" is that it is meant to be a vertical pole at the center of the (horizontal) "star-shaped plaza".   The Scribe would not have known how to render that...

All the best, --srolfi