Christian life and society. The opening of the book introduces the reader to the historical and cultural dimensions of the Cross, noting its use as a sacred symbol even before the advent of Christianity. Tyack highlights instances of the Cross's presence in pre-Christian societies and discusses early Christian attitudes towards the Cross, emphasizing the challenges they faced in openly displaying it due to the stigma associated with crucifixion. As he progresses, Tyack narrates key historical events, such as the vision of Emperor Constantine and the Crusades, that contributed to the Cross's elevation as a revered symbol of the Christian faith, setting the stage for a more detailed exploration of its implications in church rituals and architecture. (This is an automatically generated summary.)