Lyric discussion by dreamsdeferred 

Cover art for The Tower lyrics by Bruce Dickinson

this song is incredibly cool. its all about tarot cards and astrology. the "pagans who mapped the sky" into "twelve divisions" (or 12 signs: aries, taurus, etc) are astrologers, whose practices originated in i believe the pre-christian era. everything else he mentions are actually pictured on tarot cards, one for ea. day of the month: the lovers, the hanged man, the magician, the priestess, and on and on. for more info, look this stuff up. its cool.