1. Leopold von Ranke, a German philosopher, laid emphasis on utmost importance of information gathered through original documents.
2. In order to reach historical truth, it was necessary to examine all documents related to historical event. He critcised the imaginative narration of history.
3. Collection of his articles are published in two books, entitled ‘The Theory and Practice of History’ and ‘The Secret of World History’.
4. Ranke had great influence on historiography of nineteenth century.