The Resurrection Cult is a religious cult created by Priest Jacob after the zombie apocalypse began. Jacob believed that the Zombies were the holy "resurrected" who were in some way closer to god. He would ring the bell of his church to attract Z's and capture them for his services.
Jacob also spent time recruiting "living" members of his coalition to do his bidding, most notably, from Major Joe's camp, Province Town. Members of his church wore upside down crosses and he even convinced three of his members to kill themselves for the sake of his mission.