The region of fire. Brunetto Latini, Tresor , Ch. CVIII :⁠—

“After the zone of the air is placed the fourth element. This is an orb of fire without any moisture, which extends as far as the moon, and surrounds this atmosphere in which we are. And know that above the fire is first the moon, and the other stars, which are all of the nature of fire.”

“After the zone of the air is placed the fourth element. This is an orb of fire without any moisture, which extends as far as the moon, and surrounds this atmosphere in which we are. And know that above the fire is first the moon, and the other stars, which are all of the nature of fire.”