Front Rose Window. End of XIII Century. I don't think this is supposed to be a wheel of fortune: there is already one on the side of the Cathedral. It is cryptic for me: I see the 12 petals in four groups of three at the center, but, then, it is the number four which is developped.
After the first reading of today, I suspect this window was built using an Apocalyptic symbology. At the outside there are the four beasts and possibly
"Victory to our God, who sits on the throne, and to the Lamb" (Rev 7,10) [Jerusalem Bible]Yet, I cannot work out the 4x4 symbology.