The worship of Ishtar was wide-spread, and her shrines were numerous. She is often called “the queen of Babylon,” and must certainly have had a temple in that city. She had also temples at Asshur (Kileh-Sherghat), at Arbela, and at Nineveh. It may be suspected that her symbol was the naked female form, which is not uncommon upon the cylinders. [PLATE XXI., Figs. 1, 2.] She may also be represented by the rude images in baked clay so common throughout the Mesopotamian ruins, which are generally regarded as images of Mylitta. Ishtar is sometimes coupled with Nebo in such a way as to suggest the notion that she was his wife. This, however, can hardly have been her real position in the mythology, since Nebo had, as will presently appear, another wife, Varamit, whom there is no reason to believe identical with Ishtar. It is most probable that the conjunction is casual and accidental, being due to special and temporary causes. [Illustration: PLATE 21] NEBO. The last of the five planetary gods is Nebo, who undoubtedly represents the planet Mercury. [PLATE XXI., Fig. 3.] His name is the same, or nearly so, both in Babylonian and Assyrian; and we may perhaps assign it a Semitic derivation, from the root _nibbah,_ “to prophesy.” It is his special function to preside over knowledge and learning. He is called “the god who possesses intelligence,” “he who hears from afar,” “he who teaches,” or “he who teaches and instructs.” In this point of view, he of course approximates to Hoa, whose son he is called in some inscriptions, and to whom he bears a general resemblance. Like Hoa, he is symbolized by the simple wedge or “arrowhead,” the primary and essential element of cuneiform writing, to mark his joint presidency with that God over writing and literature. At the same time Nebo has, like so many of the Chaldaean gods, a number of general titles, implying divine power, which, if they had belonged to him only, would have seemed to prove him the supreme deity. He is “the Lord of lords, who has no equal in power,” “the supreme chief,” “the sustainer,” “the supporter,” “the ever ready,” “the guardian over the heavens and the earth,” “the lord of the constellations,” “the holder of the sceptre of power,” “he who grants to kings the sceptre of royalty for the governance of their people.” It is chiefly by his omission from many lists, and his humble place when he is mentioned together with the really great gods, that we know he was mythologically a deity of no very great eminence.