The Age of the Bishops, according to Hallam, was the ninth century.

The Age of the Popes, according to Hallam, was the twelfth century.

Varo recognizes Three Ages: 1st. From the beginning of man to the great Flood (the period wholly unknown). 2nd. From the Flood to the first Olympiad (the mythical period). 3rd. From the first Olympiad to the present time (the historical period).

The Golden Age, a mythical period when the earth brought forth spontaneously, and the gods held converse with men.

The Silver Age the second period, when the gods taught men the useful arts.

The Age of Bronze, the third or transition period, semi-historical. The age of heroes. It followed the "Stone Age."

The Iron Age, the historic period, when wars abound, and man earns his food by labor.