My guess is that this is how major seasonal markets were coordinated. Everyone knew when the equinox was coming but this avoided confusion about when trading should open etc. Like today artistic and religious aspects of the gathering were included but the market needed tight co-ordination to minimize conflicts.
@ardaraith The dark square is the shadow of a notice plaque that was on the railing at the entrance to the chamber. Thankfully the notice plaque has since been removed, so the illumination on the backstone no longer has the dark square.
My guess is that this is how major seasonal markets were coordinated. Everyone knew when the equinox was coming but this avoided confusion about when trading should open etc. Like today artistic and religious aspects of the gathering were included but the market needed tight co-ordination to minimize conflicts.
Molto bello spettacolare
@ardaraith The dark square is the shadow of a notice plaque that was on the railing at the entrance to the chamber. Thankfully the notice plaque has since been removed, so the illumination on the backstone no longer has the dark square.
What is making the dark square in the lower left of the light?
It was a notice plaque at the gate which has since been moved.