The book "History of World Historians in Twenty-Five Volumes, Volume 08: Parthians, Sassanids and Arabs; Crusades and the Papacy" is a powerful encyclopedia organized by historians for the whole world. In this eighth volume, the authors draw attention to the great civilizations of the Ancient East, revealing the key events that were reflected in the further development of society. You will learn about the greatness of the Parthian and Sassanid empires, as well as the important role of the Arab world in the formation of modern Europe. In addition, the book reflects on the importance of the Crusades and the influence of the Papacy on the events of the Middle Ages. This is an important source of knowledge that will expand your understanding of world history.