Priestess of Demeter and Kore
The Priestess of Demeter and Kore, sometimes referred to as the High Priestess of Demeter, was the High Priestess of the Goddesses Demeter and Persephone (Kore) in the Telesterion in Eleusis in Ancient Athens. It was one of the highest religious offices in Ancient Athens, and its holder enjoyed great prestige.
Source: Wikipedia — Priestess of Demeter and Kore (CC BY-SA 4.0)