Did war serve as a catalyst for religious change? Holger Berg explores this question using the example of Erfurt during the Thirty Years' War. Dissenting theses The strengthening or abolition of existing doctrines as a result of the war is empirically examined for the first time on the basis of the rich source material. While sermons and edifices document the teachings of four pastors, historiographical manuscripts provide information On the Convictions of the Laity The broad perspective on pastors and church members provides nuanced results for both church history and historical-anthropological research who understand the relationship between suffering, lived faith, and war experiences interested, gaining unusual insights here.