Tang Taizong's Capital: Chang'an (Modern Xi'an) in Shaanxi Province

Emperor Taizong of Tang (r. 626–649 CE) ruled from Chang'an—today's Xi'an, capital of Shaanxi Province in central China. For over two centuries, Chang'an served as the Tang Dynasty's imperial seat, becoming the world's largest and most cosmopolitan city.

Chang'an's Strategic Brilliance

• Geographic centrality: Guanzhong Plain—fertile, defensible, connected to Silk Road
• Grid planning: 84 walled wards (fang), wide avenues, markets at fixed intervals
• Population peak: ~1 million residents (750 CE), including Persian, Arab, Indian, Sogdian, Korean, Japanese communities
• Institutions: Imperial academies, state granaries, hospitals, foreign embassies, religious temples (Buddhist, Daoist, Nestorian Christian, Zoroastrian, Manichaean)

Taizong's Reign from Chang'an

The "Zhenguan Era" (627–649) saw administrative reform, legal codification (Tang Code), military expansion into Central Asia, and cultural flourishing. Taizong's court attracted scholars like Xuanzang (returned from India with Buddhist texts) and officials selected via refined examination system.

From Chang'an to Xi'an

The name changed in 1369 under the Ming ("Western Peace"). Today's Xi'an (pop. 13M) preserves Tang legacy: Giant Wild Goose Pagoda (Xuanzang's library), Daming Palace ruins (imperial complex), and the Shaanxi History Museum's unrivaled Tang collection. The city's grid still echoes Tang planners' hand.