reformers broke with Rome, all kinds of divergent groups arose. They had different creeds, different confessions, different forms of government, and different liturgies. They all claimed to be Christian churches, and many of them claimed to be the only true church. Thus, the people of that day asked: “How can we tell? What are the marks of an authentic church?” The Reformers wrestled with that question, since Rome did not recognize the Protestant churches as authentic. Rome said in the past that