Leopold von Ranke (21 December 1795 – 23 May 1886) was a German historian and a founder of modern source-based history. He was able to implement the seminar teaching method in his classroom and focused on archival research and the analysis of historical documents. Building on the methods of the Göttingen school of history, he was the first to establish a historical seminar. Ranke set the standards for much of later historical writing, introducing such ideas as reliance on primary sources (empiricism), an emphasis on narrative history and especially international politics (Außenpolitik). He was ennobled in 1865, with the addition of a "von" to his name.
Ranke also had a great influence on Western historiography and is considered a symbol of the quality of 19th century German historical studies. Ranke, influenced by Barthold Georg Niebuhr, was very talented in constructing narratives without exceeding the limits of historical evidence.