As the Mass was to celebrate the 1,400th anniversary of the consecration of the Pantheon each of the consecration crosses were lit for the celebration.
During the Mass the sun shone in this magnificent manner. A sign? An omen? Remember that the famous dome measures 142 feet in diameter (this is also the measurement of the distance from the floor to the top of the dome - the inside of the dome is a hemisphere, which is mounted on a cylinder so that if the curve of the dome was extended, it would be tangent with the floor)!