For a century and a half, the capital of China was the most cosmopolitan city on earth — a million people, Persian wine shops, churches and fire temples, and poets writing the verses every Chinese schoolchild still memorizes. The Tang made openness a state policy, and the world came.
The empire in images
The rise
The dynasty's true founder was Li Shimin — Emperor Taizong, who reigned 626 to 649 — and he took the throne by killing his brothers at the Xuanwu Gate. Then he became one of history's most admired rulers: he listened to blunt ministers, cut taxes, and built an empire that welcomed foreigners as officials and generals. Fratricide first, good government after — the Tang order of operations.
Taizong's successors pushed the frontiers to their greatest extent. The oasis cities of the Tarim Basin became Tang protectorates, Korean kingdoms fell, and the Silk Road ran at full capacity. In Chang'an's western market you could buy goods from as far as Byzantium, and the court employed Turkic generals, Sogdian financiers, and Korean scholars without a second thought.
The zenith
Under Emperor Xuanzong, who reigned 712 to 756, came the high summer. Li Bai and Du Fu — the two greatest poets in Chinese history — drank and wrote in Chang'an; woodblock printing produced the world's earliest printed books; tea culture, painting, and music flourished. A Persian merchant could live his whole life in Chang'an and never feel foreign.
The empire's confidence showed in its openness. Buddhism, Nestorian Christianity, Manichaeism, Zoroastrianism, and Islam all had communities in the capital. The Tang didn't just tolerate the world — it collected it, the way great capitals do when they are sure of themselves.
The fall
The turn came in 755, when the general An Lushan — himself of Sogdian-Turkic origin, a product of the Tang's cosmopolitan military — rebelled. The rebellion killed millions and shattered the dynasty's control; the Tang survived another 150 years but never recovered its power, its revenues, or its nerve. Openness had built the army that broke the state.
Warlords carved up the provinces, the court became a puppet of eunuchs and generals, and in 907 the last Tang emperor was forced to abdicate. China split into the Five Dynasties — fifty years of chaos before the Song reunited it. The cosmopolitan century was over, and China would never be quite so open again.
The Tang's most living legacy is poetry. Li Bai and Du Fu are memorized by every Chinese schoolchild — the Tang invented the golden age of Chinese verse, and China has been living in it ever since. Woodblock printing, perfected under the Tang, would carry texts across East Asia for a thousand years.
And there is the ideal itself: Chang'an as proof that openness and power can coincide — that an empire can be both the strongest and the most welcoming. Overseas Chinese still call themselves Tangren, “Tang people,” and Chinatowns Tangrenjie, “streets of the Tang people.” Fourteen centuries later, the cosmopolitan century is still the brand.