One of the earliest known constellations of the Zodiac, Aquarius has been recognized by numerous ancient cultures, from the Babylonians to Ancient Egypt, all of whom associate the sign with water. In Babylon, the constellation signified the god Ea, commonly depicted holding a vase. In the Ancient Greek tradition, Aquarius is depicted as a lone vase from which water emanates. In Ancient Egypt, the sign of Aquarius is associated with the flooding of the Nile that comes with the onset of spring. Aquarius has 22 main stars and is most visible in the month of October.