The famous American historian George Burton Adams in his work examines the history of the Middle Ages, from the decline of the Roman Empire to the era called the Reformation. The author talks about the beginning of Christianity, about Germanization, the formation of the papacy, about the Franks, feudalism and the Crusades, that is, about everything that pushed the world towards the Renaissance and the New Age... Everything truly valuable, acquired in the past, which is destined to be preserved and continue in the continuous development of the world.