The Tang Dynasty Most Powerful Chinese Dynasty In History

For about 300 years, one empire sat at the top of the world. Not just in terms of military or economic power, but in terms of everything, science, art, law, trade, culture, and sheer reach across the globe. Its capital city was so large that every other city on earth was a village by comparison. It had a legal code so well designed that its neighbors copied it word for word. It sat at the crossroads of the entire Silk Road, which meant the world didn't just know about it, they came to it. This was the Tang Dynasty. China's golden age and arguably the most powerful Chinese dynasty in history. China before the Tang came into power was chaotic. The Han Dynasty, China's first great imperial period, had collapsed back in 220 AD. What followed was almost 400 years of fragmentation. Warlords, competing kingdoms, invasions from the steppe, population collapse. These were not good centuries to be alive in China. Then in 581, a man named Yang Jian pulled off a reunification. He founded the Sui Dynasty and became Emperor Wen. This was genuinely impressive. After over three centuries of division, China was one country again. Emperor Wen was frugal, capable, and fair. The Sui Dynasty looked like it might actually work. Then his son took over. Emperor Yang of Sui is one of history's great examples of how to inherit something good and destroy it as fast as possible. He forced an estimate of about six million peasants to dig the Grand Canal. The same Grand Canal, a massive engineering project that connected northern and southern China. It was a useful project, but at a horrific human cost. Hundreds of thousands died building it. Then he launched three massive military campaigns against the Korean kingdom of Goguryeo. He lost all three. In the third campaign, he reportedly lost 300,000 soldiers. He taxed the people into poverty to fund these disasters. Rebellions broke out across the country. By 617, the Sui Dynasty was falling apart at every seam. Into this vacuum stepped a man named Li Yuan. Li Yuan was not some nobody who got lucky. He was an aristocrat, a military general, and through his mother's family, he had distant ties to the Sui royal house itself. He knew the system from the inside. In 617, when the Sui Dynasty was visibly collapsing, Li Yuan raised his forces in Taiyuan in northern China, and marched on the capital, Chang'an. He took the capital. And in 618, when Emperor Yang of Sui was assassinated by one of his own officials in the south, Li Yuan formally declared himself the first emperor of a new dynasty, the Tang, and took the throne name Gaozu. But one thing about the founding of the Tang Dynasty is that a lot of the actual military genius behind it wasn't Li Yuan. It was his second son, Li Shimin. Li Shimin was about 18 years old when the rebellion started. He was already a better battlefield commander than most men twice his age. Over the next decade, he personally led the campaigns that crushed Tang's remaining rivals and unified China by 628. He was brilliant, charismatic, and increasingly aware that he had done more to build Tang than his older brother Jian Cheng, who was the crown prince and technically the heir. The tension between the brothers grew until it could not be contained. In 626, Li Shimin moved first. At the Xuanwu Gate of the Imperial Palace in Chang'an, Li Shimin and his allies ambushed and killed both his older brother Jian Cheng and his younger brother Yuanji. He then went directly to his father, Emperor Gaozu, and informed him of what had happened. Gaozu, now with no surviving sons except Li Shimin, abdicated. Li Shimin became Emperor Taizong. For centuries, historians have argued about how to judge the Xuanwu Gate incident. Taizong himself apparently felt enough about it to commission official histories that softened the account. But the result was undeniable. Tang got one of the most capable rulers in all of Chinese history. What he built next is the reason we still talk about this dynasty. Taizong ruled from 626 to 649. In Chinese historical tradition, this period is called the Reign of Zhenguan and held up as the gold standard of good government. Not just in Tang history, but in all of Chinese history. So what did Taizong actually do? First, he fixed the law. The Tang Code, formally completed in 653 after Taizong's death but began during his reign, was one of the most comprehensive legal documents in the ancient world. It covered everything from criminal offenses to administrative regulations to family law. It was precise. It was relatively humane by the standards of its time. And it was so well-constructed that the Korean, Japanese, and Vietnamese legal systems adopted large parts of it directly. Second, he strengthened the civil service examination system known as the keiju. The idea was simple and radical at the same time. Instead of handing government jobs to aristocrats purely on the basis of birth, you test people. The ones who score highest get the jobs. This didn't eliminate aristocratic privilege. But it opened a door, and over time, that door would change Chinese society dramatically. Third, he expanded Tang's territory aggressively but strategically. In 630, Tang forces destroyed the eastern Turkic Kaganate, which had been extracting tribute from and threatening northern China for decades. After this victory, the Turkic tribal leaders gave Taizong a title, Tian Kehan, which means Heavenly Khan. A Chinese emperor being honored in Turkic tradition. That tells you something about the breadth of his reach. Fourth, this is the one that really stands out. Taizong cultivated honest advisors and actually listened to them. The most famous of these was Wei Zheng. Wei Zheng had actually been a supporter of Taizong's older brother, Jian Cheng, the one Taizong killed at Xuanwu Gate. Most rulers would have had him executed. Taizong made him a senior minister. Then, Wei Zheng spent the rest of his life arguing with the emperor. He criticized Taizong's decisions in open court. He wrote direct, sharp memoranda, pointing out the emperor's mistakes. And Taizong, to his enormous credit, protected him every time and rewarded him for it. When Wei Zheng died in 643, Taizong reportedly stood over his coffin and said something along the lines of, with a bronze mirror, you can fix your appearance. With history as a mirror, you can understand rise and fall. With a man as a mirror, you can see your own errors. Wei Zheng was that mirror for me, and now I've lost him. That quote has been repeated for 1,400 years in China. It still is today. Because what it describes, a ruler who genuinely wanted to be corrected, is so rare that when it happens, people remember it forever. Taizong died in 649 at the age of 51 from mercury poisoning from a Taoist elixir he was taking in search of immortality. He was succeeded by his son, Emperor Gaozong. And the Tang story continued. But it continued in a direction nobody quite expected because of a woman who had been in Taizong's palace all along. Before we go any further into the political story, we need to talk about Chang'an. Because you cannot understand the Tang dynasty without understanding its capital. Chang'an, modern-day Xi'an in Shanxi province, was, at its height during the Tang period, almost certainly the largest and most cosmopolitan city on the face of the earth. The city covered roughly 84 square kilometers. It was laid out in a precise grid of 108 enclosed wards, each with its own walls and gates that closed at night. The imperial palace complex sat at the northern end. The whole thing was said to have been designed with a mathematical precision that communicated power and order to anyone who saw it. Population estimates for Tang period Chang'an range from 600,000 to over a million people within the city proper, with another million or so in the surrounding region. To put that in some perspective, medieval London at this time had perhaps 15,000 people. Paris, maybe 30,000. The Byzantine capital Constantinople, the largest city in the Western world, had around 300,000 to 400,000. Chang'an was in a different category entirely. But it wasn't just large. It was diverse in a way that had no parallel anywhere else. The West Market of Chang'an was the western terminus of the Silk Road. Walk through it and you'd encounter Sogdian merchants from Central Asia, Persian traders, Arab merchants, Indian Buddhist monks, Byzantine craftsmen, and Korean and Japanese students all in the same afternoon. Goods flowing in included glassware from Syria, spices from Southeast Asia, gemstones from India, horses from Central Asia. Goods flowing out included silk, porcelain, tea, and paper. Religiously, Chang'an was equally open. There were Buddhist monasteries, Taoist temples, Zoroastrian fire temples, Nestorian Christian churches, and, after Arab contact grew in the 7th century, early mosques, all functioning openly in the same city. Culturally, Central Asian influence was everywhere. The pipa, a lute-like instrument from Central Asia, became one of Tang's defining musical instruments. Polo, imported from Persia, became the sport of the Tang aristocracy. Sogdian dancers performing a whirling style of dance became fashionable at court. Emperor Xuanzong, who we'll come to shortly, was so passionate about music and performance that he founded the Pear Garden, a formal imperial academy for musicians and performers attached to the court. Thousands of performers trained there. Even today, over 1,200 years later, Chinese opera performers refer to their artistic lineage as coming from the Pear Garden. The institution is long gone. The name stuck. Chang'an was not just a capital. It was a statement about what an empire could be. And the Tang dynasty built it and maintained it for nearly three centuries. Okay, now. Wu Zetian. This is one of the most debated figures in all of Chinese history. People have been arguing about her for 1,300 years. Was she a monster? Was she a brilliant ruler? Was she both? Let's just go through what actually happened. The facts are enough without needing any embellishment. Wu Zetian was born in 624. At the age of 14, she entered the palace as one of the dozens of concubines of Emperor Taizong. When Taizong died in 649, tradition required that his concubines shave their heads and retire to a Buddhist convent for the rest of their lives. Wu Zetian went to the convent. But then Emperor Gaozong, Taizong's son and successor, encountered her on a visit to the convent. He was already infatuated with her from his father's court. He brought her back to the palace as his own consort. From that point on, Wu Zetian's rise was relentless. She maneuvered against Gaozong's existing empress, Empress Wang, and against a rival consort known as Consort Xiao. By 655, she had been declared the new Empress Consort, replacing Empress Wang. The old Empress and Consort Xiao were imprisoned, then executed in circumstances that historical sources describe in very dark terms. Through the 660s and into the 670s, Gaozong's health seriously declined. He suffered from severe headaches that modern historians have speculated might indicate a stroke condition. During this period, Wu Zetian took on increasingly direct administrative responsibilities. Court documents began referring to her and Gaozong jointly as the Two Sages. She was, functionally, running the empire. When Gaozong died in 683, Wu Zetian became regent for her son. Emperor Zhongzong. Within two months, she removed him and replaced him with another son, Emperor Ruizong, who was more pliable. By now, you should have grabbed that she was the real power behind the throne. Then, in 690, she stopped pretending. Wu Zetian formally declared a new dynasty, the Zhou, and proclaimed herself its emperor. You see that? Not empress consort, not empress regent. The emperor. The title of son of heaven, which in Chinese political theory could only be held by a man with the mandate of heaven. She took it. She was the only woman in Chinese history to ever do this. As emperor, she expanded the civil service examination system deliberately and aggressively, creating new examination categories and personally presiding over some of the exams. Historians note that part of her motivation was to undercut the old aristocratic families who resented her and to replace them with officials who owed their careers directly to her. Smart politics, also genuinely good policy. She used Buddhism as a political tool. Buddhist texts were circulated that identified her as a reincarnated bodhisattva, a compassionate being sent to rule. She patronized temples generously. The Longmen Grottoes near Luoyang, one of the great monuments of Tang Buddhist art, were largely developed under her patronage. She also maintained a network of informants and secret police that made it extremely dangerous to oppose her openly. Multiple members of the imperial Li family, the original Tang dynasty family, were killed during her reign. She was not gentle with her enemies. In 705, when she was 81 years old and seriously ill, a group of senior court officials staged a palace coup, forced her to abdicate, and restored the Tang dynasty under her son, Emperor Zhongzong. She also died later that year. So how do we judge her? The Chinese historians of the Song dynasty, writing centuries later with every incentive to condemn her, still acknowledged that she governed effectively. The Tang state was functional and militarily competitive during her rule. The examination system she expanded outlasted her by a thousand years. The territories she managed were largely held. She was ruthless in ways that would be condemned by any standard. She was also capable in ways that most rulers, male or female, never matched. Both things are true. That complexity is exactly why she's still being argued about today. After Wuzetian, Tang went through a period of instability. Empress Wei, the wife of restored Emperor Zhongzong, tried to repeat Wuzetian's rise and failed badly. There was another coup in 710. Then, finally, a ruler arrived who could actually steady things. Emperor Xuanzong came to the throne in 712. He would reign for 44 years. The first half of his reign, roughly 713 to 741, called the Kaiyuan Era, is considered the absolute high point of Tang civilization. Seriously, I personally think this is the high point of the entire medieval world. The numbers of this Tang Era are staggering. The population, according to the recorded census of 742 under Xuanzong, reached an estimated 50 to 53 million people. Tax revenues were the highest in Tang history. The grain reserves were full. The military was strong and well-organized. The silk road trade was at its most active. China, under Xuanzong, was, by almost any measurable standard, the most powerful and prosperous state on earth. Then there was the culture. Li Bai and Du Fu, the two men most people would name if you asked for China's greatest poets, were both writing during Xuanzong's reign. Li Bai was the wandering Taoist romantic, supposedly composing poetry drunk on moonlit rivers, celebrating wine and freedom and the wildness of nature. Du Fu was the other side of the coin, a man who watched the empire's struggles with clear, compassionate eyes and wrote about war, poverty and political failure with an honesty that was almost radical for its time. These two men knew each other. They met. They drank together. In the history of literature, that meeting is a little like if Shakespeare had hung out with Cervantes. A third giant of Tang poetry, Wang Wei, was also active during this period. Wang Wei was a government official, a painter and a Buddhist. His poetry about solitude, nature and contemplation created a style that Chinese poets have been imitating ever since. Xuanzong himself was deeply invested in the arts. He personally played music, composed songs and founded the Pear Garden, that royal academy of performing arts we mentioned earlier when talking about Chang'an. Which trained thousands of musicians and performers under imperial patronage. But around 740, things began to change. Xuanzong became intensely infatuated with a young woman named Yang Yuhuan, known to history as Yang Guifei, or precious consort Yang. She had originally been the consort of one of Xuanzong's sons. Xuanzong had her entered into a religious order then, in a legal fiction that fooled nobody. He took her as his own imperial consort. Yang Guifei's family rose rapidly. Her cousin, Yang Guozhong, was appointed chief minister in 752. He was not up to the job. Political management deteriorated. Competent officials were pushed aside. The court became focused on luxury and factional positioning. Out on the frontiers, something else was building. The Tang government had, over the previous century, increasingly relied on semi-autonomous military governors, the jiedushi, to manage frontier defense. These governors controlled their own armies, their own tax collection, their own appointments. By the 750s, they commanded forces that dwarfed what the central government could put in the field directly. One of these governors, a man named An Lushan, commanded three frontier armies simultaneously. In December 755, An Lushan used this massive army. An Lushan was the son of a Sogdian father and a Turkic mother. Born on the frontier, tough, multilingual, and enormously fat, which apparently did nothing to diminish his effectiveness as a soldier or his talent for political maneuvering at court. He had charmed Xuanzong to an almost absurd degree. He had even been ceremonially adopted by Yang Guifei as a joke, an adult son of the imperial consort. He played the fool at court while building one of the largest private armies in the empire. On December 16th, 755, he marched south from his base at Fanyang with roughly 160,000 troops. The Tang court was caught completely off guard. The central government's own military forces had atrophied. The wealth of the Kaiyuan era had made conscription unpopular and the government had come to rely on the frontier armies instead of maintaining strong central forces. There was almost nothing standing between An Lushan and the capitals. Luoyang, the eastern capital, fell in January 756. Chang'an fell in July. Xuanzong, now 71 years old, fled the capital in the middle of the night with a small escort. They headed southwest toward Sichuan. Then, at a relay station called Mawei, everything fell apart. The imperial guard escorting Xuanzong mutinied. They killed Yang Guozhong, the chief minister, blaming him for the catastrophe. Then the officers approached Xuanzong himself with a demand. Yang Guifei had to die. The logic, brutal as it was, made a kind of sense to the soldiers. Yang Guozhong was her cousin. The Yang family's political influence had contributed to the mismanagement that allowed this disaster. The soldiers would not move on until she was dead. Xuanzong tried to argue. The accounts say he wept. He was 71 years old, standing in a relay station on the side of a road with his empire collapsing around him, and his guards were telling him to give the order. He gave it. Yang Guifei was led away by the chief eunuch official Gao Lixi to a pear tree in a courtyard beside the station and strangled. She was around 38 years old. Xuanzong never saw Chang'an again. He survived the war, but his son, who had declared himself Emperor Suzong in the north to continue the dynasty, allowed him to return to the capital in 757 as a retired emperor with no real power. He lived out his last years largely in isolation, reportedly weeping over Yang Guifei for the rest of his life. The An Lushan rebellion itself lasted from 755 to 763. It took Tang forces, supplemented heavily by Uyghur cavalry allies who extracted enormous payment for their help, to eventually retake both capitals and wear down the rebel coalition. An Lushan himself was assassinated by his own son in 757. The rebellion continued without him under his successors until finally collapsing in 763. There was a significant human cost that was catastrophic. A census taken in 754 before the rebellion recorded a registered population of roughly 52 million people. The census of 764, taken after it ended, showed only about 17 million registered. Some of that drop reflects population displacement and administrative collapse rather than pure death. But historians using modern demographic analysis still estimate total deaths from battle, famine, disease, and displacement in the range of 13 to 36 million people. The An Lushan rebellion is one of the deadliest conflicts in human history. It simply doesn't get talked about in the West the way it deserves to. Tang survived. But the Tang that emerged from 763 was a fundamentally different dynasty from the Tang that had entered 755. The central government's authority over the provinces was permanently weakened. The jiedushi, military governors, had demonstrated that they could field armies that made the court irrelevant. Many of the governors who had fought for Tang in the North simply stayed in their territories as autonomous rulers, paying nominal tribute and nothing more. The dynasty had survived, but its real power had not. The last 150 years of Tang history are, honestly, exhausting. Not because nothing interesting happens, a lot happens, but because the pattern repeats. Weak emperor. Powerful eunuchs. Factional politics. Rebellious governors. Crisis. Partial recovery. Crisis again. Let's hit the main structural problems and then the event that really finished Tang off. Problem 1. Eunuchs. Tang's palace eunuchs had been a fact of court life since the beginning of the dynasty, as they were in most Chinese imperial courts. But after the An Lushan Rebellion, they accumulated institutional power at an alarming rate. By the 800s, eunuchs in Tang were not just managing the palace, they were commanding the imperial guard armies and effectively selecting emperors. Multiple emperors in the 800s were placed on the throne by eunuch factions and removed or killed by them when they became inconvenient. The emperor was theoretically the son of heaven. In practice, he was often a prisoner in his own palace. Problem 2. The newly factional struggle. For about 40 years, from roughly 808 to 846, the court bureaucracy was paralysed by a bitter factional split between two groups of officials. Broadly, those who had risen through the examination system and those from traditional aristocratic backgrounds, named after their leading figures, Niu Cengru and Li Deyu. The content of their arguments was mostly secondary to the bitterness of the conflict itself. The government simply didn't function well. Problem 3. The jiedushi. The semi-autonomous military governors, as I noted earlier, never went back in the box after the An Lushan rebellion. Large areas of northern China were effectively independent fiefdoms that happened to nominally acknowledge the Tang emperor. When those governors decided to be cooperative, things worked. When they didn't, there was nothing the court could reliably do about it. Problem 4. Money. The Tang government struggled chronically with revenue after the rebellion. The salt monopoly, one of the government's main revenue sources, became a black market with large-scale, illegal salt smuggling networks developing that the government couldn't suppress. One of the leaders of these networks, Huang Chao, would eventually become the most dangerous man in China. Huang Chao came from a salt merchant family in what is now Shandong province. He was educated enough to sit for the imperial examinations. He failed them, repeatedly, multiple times. Whether that failure was what radicalized him, or whether he would have ended up where he did regardless, is impossible to know. What's recorded is that by the 870s, he was running large-scale salt smuggling operations and had built up a private army. In 874, following a drought and famine that destabilized much of northern China, Huang Chao joined an existing peasant uprising under a man named Wang Xianzhi. When Wang died in battle in 878, Huang Chao took command of the movement. What followed was one of the most dramatic marches in medieval history. Huang Chao led his army across the entire length of China, south to Guangzhou on the coast, then north again across the Yangtze, then west toward the capitals. Tang's defenses crumbled before him. In 881, he captured Chang'an and declared himself emperor of a new dynasty, the Qi. His forces committed horrific atrocities in the cities they took. Contemporary sources describe mass killings in Guangzhou that killed tens of thousands, including large numbers of foreign merchants, Arab, Persian, and Jewish traders who had lived there for generations. Huang Chao could capture Chang'an, but he couldn't hold it. Tang forces, bolstered by Shatuo Turkic cavalry, under a commander named Li Keyong, counterattacked. By 883, Huang Chao had been driven from Chang'an. He was finally defeated and killed in 884 by his nephew. Chang'an never recovered. The city that had been the wonder of the world was gutted. It would never again reach the population or cultural prestige it had held at its Tang peak. The Tang dynasty that emerged from the Huang Chao rebellion was barely a dynasty at all. Real power was now held by a handful of competing warlords. Some of them had been on the Tang side during the rebellion. But one particular one, Zhu Wen, had actually been on Huang Chao's side. Zhu Wen had started out as a rebel under Huang Chao. In 882, seeing which way things were going, he defected to the Tang side and was rewarded with military appointments. Over the following two decades, he used those appointments to build his own power base in the northeast, playing rival warlords off against each other and systematically eliminating his competitors. By the early 900s, he was the strongest man in China. The Tang emperor, Zhao Zong, was essentially his hostage. In 903, Zhu Wen moved against the court eunuchs, the faction that had wielded palace power for a century. He rounded up over 300 of them in a single night and had them killed. The eunuchs, for all their faults, had at least been an internal court faction. With them gone, there was nothing left between Zhu Wen and complete control. In 904, Zhu Wen had Emperor Zhao Zong murdered and replaced with his 13-year-old son as Emperor Ai, a child emperor with no real power. In 907, Zhu Wen dispensed with the pretense entirely and forced Emperor Ai to formally abdicate. The Tang dynasty's 289 years reign was over. Zhu Wen declared his own dynasty, the later Liang, and took the throne. Emperor Ai was sent to live under house arrest. In 908, at the age of 17, Zhu Wen had him poisoned. The dynasty that had begun with Li Shimin killing his brothers at the Xuanwu Gate ended with a boy emperor being poisoned by the man who had taken everything from him. What followed Tang was called the Five Dynasties and Ten Kingdoms period. 53 years of fragmentation and competing warlord states, none of them strong enough to reunify China. That reunification eventually came in 960, when the Song Dynasty pulled things back together. But that's a story for another video. So after all of that, the founding, the Golden Age, the rebellion, the slow collapse, what did Tang actually leave behind? It is more than almost any dynasty in Chinese history. During Tang's peak, Japan sent multiple large embassy missions, called the Kento-shi, to China to study Tang government, law, art, and religion. The result was the Nara Period in Japan, which was essentially an attempt to rebuild a version of Tang on Japanese soil. Nara City was modelled on Chang'an's grid layout. The Japanese governmental structure was reorganised along Tang bureaucratic lines. Buddhism as it was practised in Tang became the dominant form in Japan. Also, the unified Silla Kingdom that consolidated the Korean Peninsula in the 7th century had a close, if not always comfortable, relationship with Tang. Korean scholars studied in Chang'an. Korean officials adopted Tang administrative models. Tang's cultural influence on Korea lasted centuries beyond the dynasty itself. The Tang Code, that legal system Taizong began and Gaozong completed, became the template for legal systems across East Asia. Japan's Taiho Code of 701 drew directly from it. Vietnam's legal traditions were shaped by it. Korea's legal development was influenced by it. In terms of legal legacy, few ancient documents touched as many societies. The Tang Period established classical Chinese poetry as a mature art form with a defined canon. Li Bai, Du Fu, Wang Wei, Bai Juyi. These poets are still memorised in Chinese schools today. The examination system that Tang strengthened required candidates to compose poetry, which meant that for a thousand years after Tang, every Chinese official had to be literate, not just in prose, but in verse. The Tang poets set the standard everyone was measured against. Block printing, the process of carving text into wooden blocks and printing multiple copies, was developed and commercialised during the Tang Period. The world's oldest known printed book, the Diamond Sutra, was printed in 868 AD during the late Tang Period. Printing made books cheaper. Cheaper books spread literacy. This was the first step in a chain that would eventually lead to Gutenberg and the information revolutions of the modern world. Then there's the name. In Chinese communities across the world, Southeast Asia, North America, Europe, Australia, the word that millions of overseas Chinese use to identify themselves is Tangren. Tang people. Not Han people. Not Chinese people in a general sense. Tang people. A dynasty that ended in 907 is still embedded in how people describe who they are today. Chinatowns in cities around the world are called Tangrenjie, streets of the Tang people, in Chinese. That's what a dynasty looks like when it gets everything right. Even when it eventually falls apart, it leaves a name that outlasts it by a thousand years. That is the Tang Dynasty's 289 years history. If you made it to the end of this video, you now know the full arc of one of the most important civilizations in human history. If this was useful historical knowledge, hit the like button. Subscribe if you want more history done this way. Drop a comment telling me which Chinese dynasty you want me to cover next. The Han, the Song, the Ming, or the Qing dynasty. Drop it in the comment below. I'll see you in my next video.