Revelation 17:9 And here is the mind which hath wisdom. The seven heads are seven mountains, on which the woman sitteth.
10 And there are seven kings: five are fallen, and one is, and the other is not yet come; and when he cometh, he must continue a short space.
11 And the beast that was, and is not, even he is the eighth, and is of the seven, and goeth into perdition.
We now learn about the 7 hills on which the woman sitteth. Remember also this woman represents the church that is in control and because it is in Rome we believe it to be the Roman Catholic Church that has been in existence through most time period covered by these 7 kings that have ruled or will rule . These are the first six kingdoms Egypt, Assyria, Babylonia, Medo-Persia, Greece, and Rome. The seventh king will be the Antichrist that rules the first three and one half years, and remember he is presumed to be killed and when he is raised from the supposedly raised from the dead he is empowered completely by the beast or Satan. This makes him the eight and final king and will be cast into the lake of fire at the end. It is believed the Antichrist will come out of the revived Roman empire. Also remember the woman is destroyed after the first three and one half years so the Antichrist rules the whole world.