Der Erste Kreuzzug: The First Crusade (1887) is a historical book written by Friedrich Von Raumer. The book provides a detailed account of the First Crusade, which took place in the 11th century. The author chronicles the events leading up to the crusade, including the religious and political motivations behind it. He also describes the key figures involved in the crusade, such as Pope Urban II and the various European leaders who led the armies...