同慶帝
He was also a celebrated historian who was in charge of the National History Institute (Quốc Sử Quán) and the Imperial College (Quốc Tử Giám). He was the final editor of "The Imperially Ordered Annotated Text Completely Reflecting the History of Vietnam", a Chinese-language history of Vietnam commissioned by the emperor Tự Đức, and the mentor of future emperors Dục Đức and Đồng Khánh. There is now a prize for doctoral theses in History named after him, the Phạm Thận Duật Award.