Bisheshwar Nath Reu (2 July 1890 – 1947) was an Indian historian. He started his career as an assistant to Gaurishankar Hirachand Ojha, and learned the ancient Dingal language from him.[1] Later, he was appointed as the head of the Department of History (by Maharaja Sumer Singh of Jodhpur),[1] Department of Archaeology (by Maharaja Ummed Singh of Jodhpur),[1] the Sardar Museum, the Pustak Prakash (Manuscript Library) and Sumer Public Library of the erstwhile princely state of Jodhpur.[2] Mahamahopadhyaya He made his mark as a historian, epigraphist, numismatist and Sanskritist, he is best known for his history of Marwar.[3]