A Sibyl Holding a Scroll (Study for the Cimmerian Sibyl), 1638, Pen and dark brown ink, sheet: 7 13/16 x 5 7/8 in. (19. 8 x 15 cm), Drawings, Guercino (Giovanni Francesco Barbieri) (Italian, Cento 1591?1666 Bologna), Like other Sibyls of the ancient world, the Cimmerian Sibyl - whose real name was Carmentis - was venerated as the great prophetic priestess presiding over the Apollonian Oracle at Cimmerium in Italy, near Lake Avernus