Emperor Xuanzong of Tang, Li Longji

Timeline

1. c. 685–710Luoyang · Henan ProvinceLi Longji was the third son of Emperor Ruizong of Tang, clever as a youth and enfeoffed as Prince of Linzi. In the fourth year of Jinglong he launched a coup with Princess Taiping and others, killing Empress Wei's faction, restoring his father Ruizong to the throne, and was later made crown prince.
2. 712–741Chang'an · Shaanxi ProvinceHe ascended the throne in the second year of Xiantian and changed the era name to Kaiyong. Employing capable chancellors Yao Chong, Song Jing, Zhang Yue, and Zhang Jiuling, he reformed administration and developed the economy, bringing Tang power to its zenith, known historically as the Kaiyuan prosperity.
3. 742–756Chang'an · Shaanxi ProvinceAfter changing the era name to Tianbao he gradually neglected state affairs, favoring Li Linfu and Yang Guozhong and entrusting frontier general An Lushan with heavy troops. In the fourteenth year of Tianbao An Lushan rebelled; Xuanzong fled west into Shu, had Consort Yang executed at Mawei Relay Station en route, and Crown Prince Heng acceded at Lingwu.
4. 756–762Chang'an · Shaanxi ProvinceHe returned to Chang'an in the second year of Zhide, was honored as retired emperor, confined to the western palace, and lived in gloom. He died in April of the first year of Baoying at the Ganlu Hall, with posthumous name Zhidao Dasheng Daming Xiao Emperor, temple name Xuanzong, and was buried at Tai Mausoleum.