sporadicq:The Oculus (top) in the dome of the Pantheon, Rome. Open to the weather, the oculus allo
sporadicq: The Oculus (top) in the dome of the Pantheon, Rome. Open to the weather, the oculus allows rain to enter and fall to the floor, where it is carried away through drains. Though the opening looks small, it actually has a diameter of 27 ft (8.2 m) allowing it to light the building just as the sun lights the earth. The rain also keeps the building cool during the hot summer months. -- source link