Peter the Hermit
The greatest German historian of the Crusades was then Reinhold Röhricht. His histories of the First Crusade, "Geschichte des ersten Kreuzzuges", and of the kings of Jerusalem, "Geschichte des Königreichs Jerusalem," laid the foundation of all modern crusade research. His "Bibliotheca geographica Palaestinae" summarizes over 3500 books on the geography of the Holy Land, providing a valuable resource for historians. Röhricht's colleague Heinrich Hagenmeyer wrote "Peter der Eremite," a critical contribution to the history of the First Crusade and the role of Peter the Hermit.