Tang Dynasty chancellor and historian who compiled the 200-volume Tongdian, founding the genre of institutional general history in Chinese scholarship.
The Old Tang History says Du You enlarged an earlier work, adding the Kaiyuan rites and music, and finished it in 200 scrolls under the name Tongdian. In 801, the seventeenth year of Zhenyuan, he sent an envoy from Huainan to present it at the palace.
Named Minister over the Masses and chief councilor
From 806
The Old Tang History says that when Emperor Dezong died, Du You acted as chief steward of the court in mourning, and he did so again when Emperor Shunzong died. In 806 he was formally appointed Minister over the Masses and Joint Manager of Affairs, and was made Duke of Qi. Later he asked to retire, but the edict refused; he was only to attend the Secretariat every three to five days to share in state business.