Narrated by Liam Neeson, this six-part CNN Original Series chronicles the 2,000-year evolution of the papacy from a persecuted grassroots movement to a global political powerhouse. The production utilized access to Vatican archives and features commentary from historians such as Diarmaid MacCulloch and Eamon Duffy. Dramatic recreations depict pivotal moments of the Renaissance, the Reformation, and the Church's role in the World Wars. The docuseries connects historical origins with modern-day challenges facing the Catholic Church and its 1.2 billion followers.