In the upper
register the Evangelists work beside their attributes -- the lion,
eagle, youth, and ox.
The inscriptions to
the left and right of Averroes are vere
hic est lumen ecclesie, "truly here is the light of the Church"
and hic adinvenit omnem viam
discipline, "here he found the entire way of discipline."
In the bottom register is a papal council.
More of Thomas Aquinas