In January 1837, a remarkable event unfolded in a small Baptist church in Cincinnati, Ohio: the Catholic Bishop John Purcell and the Protestant minister Alexander Campbell engaged in a weeklong public debate that captivated the community.Against a backdrop of intense anti-Catholic sentiment in America, these two towering religious leaders participated in a civil yet passionate dialogue on theology, politics, and the role of Catholicism in America.Over seven propositions, they dissected contentious topics such as apostolic succession, the authority of Scripture, and the Catholic Church’s compatibility with American republicanism.This book delves into the story of this unprecedented debate, exploring its historical context, the lives of its participants, and its lasting impact on American religious discourse.More than a clash of ideologies, the debate became a “third space” where religious and cultural boundaries were crossed, fostering mutual respect and understanding.This book offers a compelling narrative of one of the most significant religious debates in American history, illustrating how two leaders with profound disagreements created a model of dialogue and civility that remains relevant today.