Triple Goddess

Sometimes called the Triple Moon, this symbol represents the three phases of the moon: waxing, full, and waning.
According to Robert Graves' The White Goddess, it also represents the three phases of womanhood, in the aspects of Maiden, Mother and Crone, each of which symbolises both a separate stage in the female life cycle and a phase of the moon.
This concept represents the feminine part of Wicca's duotheistic theological system, her masculine part is the Horned God.
Many other neopagan belief systems follow Wicca in their use of the figure of the Triple Goddess, and it continues to be an influence on feminism, literature, Jungian psychology and literary criticism.