Chaldea
"Chaldea" is the term the 4th century and later Greeks used for Babylon. It is the way they transliterated the Assyrian name Kaldū, which was an area that lay southeast of Babylonia towards the coast of the Persian Gulf. The term "Oracles" was probably bestowed upon these writings to arouse the sense of their having a profound and deeply mysterious nature. To the number of Sibyls, later Greeks added a "Persian Sibyl" or a "Babylonian Sibyl" whom the "Chaldeans" were imagined to venerate as highly as the Greeks did the oracle of Delphi.
Read more about this topic: Chaldean Oracles