"The Origin of the Medieval Church and Its Influence on the Civilization of Western Europe from the First to the Thirteenth Century" is an important book for the study of medieval history, written by the scholar Alexander Clarence Flick. The author examines the formation and development of the church in the period from the Vikings and Carolingians to the development of papal power and Catholic influence in medieval Europe. The book examines the religious, social and political aspects of the development of the church and its influence on the culture of Western European society. Carefully researching sources and archival materials, Flick presents a vivid and interesting history of the influence of the church on the formation of medieval civilization.