Nguyn Phúc Miên Tông (6 June 1807 - 4 November 1847) was the third emperor of the Vietnamese Nguyn Dynasty taking the era name of Thiu Tr. He was the eldest son of Emperor Minh Mng, and reigned from 14 February 1841 until his death on 4 November 1847. Emperor Thiu Tr was much like his father Minh Mng and carried on his conservative policies of isolationism and the entrenchment of Confucianism. Highly educated in the Confucian tradition, Thiu Tr had some curiosity about the West, but like his father was very suspicious of all non-Chinese outsiders. Hue was the imperial capital of the Nguyen Dynasty between 1802 and 1945. The tombs of several emperors lie in and around the city and along the Perfume River. Hue is a UNESCO World Heritage Site.