 Such king gods are collectively categorized as "sky father" deities, with a polarity between sky and earth often being expressed by pairing a "sky father" god with an "earth mother" goddess (pairings of a sky "mother" with an earth "father" are less frequent).A main sky goddess is often the queen of the gods and may be an air/sky goddess in her own right, though she usually has other functions as well with "sky" not being her main.In antiquity, several sky goddesses in ancient Egypt, Mesopotamia, and the Near East were called Queen of Heaven.