The sibyls were prophetesses or oracles in Ancient Greece.
Statue in the Temple of Zeus at Aizanoi, believed to depict a sibyl
Michelangelo's Delphic Sibyl, Sistine Chapel ceiling
Michelangelo's Libyan Sibyl, Sistine Chapel ceiling
Sibyl by Francesco Ubertini, c. 1525
The Delphic Sibyl was a prophetess associated with early religious practices in Ancient Greece and is said to have been venerated from before the Trojan Wars as an important oracle. At that time Delph
Michelangelo's depiction of the Delphic Sibyl on the Sistine Chapel ceiling
Archaeological Site of Delphi by Joy of Museums