antares is one of four "royal stars", each in a fixed zodiac sign - that is a sign in the middle of each season
the others are aldebaran in taurus, regulus in leo and fomalhaut in aquarius (although it is actually in the pisces constellation)
each star (and its equivalent sign) represents one of the faces of the cherubim mentioned in the bible, with antares/scorpio being the eagle as scorpio has 3 symbols with an eagle being the highest
the four evangelists, mathew, mark, luke and john and said to also be represented by these stars and the faces of the cherubim