Aion is a Hellenistic deity associated with time, the orb or circle encompassing the universe, and the zodiac. The "time" which Aion represents is perpetual, unbounded, ritual, and cyclic: The future
Aion depicted as a young man with wings attached to his temples, standing in the circle of the zodiac, with Terra and four putti (representing the seasons) nearby, Roman mosaic, Sentinum, c. 200–300 AD
Detail from the Parabiago plate depicting Aion; Ajax is shown holding up the zodiac from below, and Tellus (not shown) appears on the plate outside of this image, just past the bottom left of the picture, reclining among her children by Aion.