Legendary riddle of China's lost prince could finally be solved after 2,000 years thanks to 'mindblowing' discovery: Coffin found close to Terracotta Army tomb could contain first emperor's son

An ancient story etched in Chinese folklore since the beginning of civilisation as we know it may finally be decoded following a 'mindblowing' discovery in the historic city of Xi'an.

For nearly 2,000 years, the myth of Prince Gao - son to the brutal first emperor of China, Qin Shi Huang - has been carried down the generations, carved into legend in the surviving epic saga of historian Sima Qian, himself writing around 85 BCE.

Now, the discovery of a 16-tonne coffin in an expansive burial chamber near the mausoleum of Qin Shi Huang and his terracotta warriors could bring the myth to life.

Experts believe the tomb may belong to the forgotten prince, and the treasures inside could help piece together fragments of an ancient story of how one of the world's first states rose and fell.

Fifty years since the discovery of the famed terracotta warriors, built in their hundreds to protect the Qin strongman in the afterlife, British-Chinese filmmakers have received unprecedented access to explore the ongoing work to excavate the chamber.

Here, they learn of the ongoing race to carefully uncover and preserve record of our collective history before it is lost to time and exposure. 

At the bottom of a tomb in central China, 16 metres deep and 109 metres long, a coffin sealed for millennia continues to puzzle archaeologists.

The scale of the site is enormous, and its significance has stirred sentiments that experts may soon uncover verifiable evidence to support a myth until now handed down through ancient texts.

'Every time I go down I still feel amazed,' said dig leader Jiang Wenxiao, as reported by The Times. 

The tomb was discovered a little over a decade ago, but has come into focus with the anticipated Netflix documentary Mysteries of the Terracotta Warriors.

In a tiny enclave of central China, the famous warriors and the tomb together straddle the colossal resting place of China's first emperor, Qin Shi Huang. 

It took more than 7,000 workers to construct the 22sq-mile mausoleum over a period of 38 years. Their craftmanship is evidenced by the lasting preservation of their work.

But within a year of the mausoleum's completion in 208 BCE, Qin Shi Huang died and the great Qin Dynasty fell into bitter civil war. The capital was destroyed and the citizens of the empire ultimately divided between 18 separate kingdoms.

Today, we still turn to myths passed down through the generations to get a sense of life in the ancient world. Soon after the collapse of the Qin Dynasty, early historians began keeping records of fantastical tales of great leaders, dramatic battles and local legends.

The myth of Prince Gao, the son of China's merciless first emperor, was written into history by the great storyteller Sima Qian, a product of the imperial Han Dynasty that followed the early Qin Dynasty.

From Sima Qian's monumental history, the Shiji, the early Chinese learned about the short-lived Qin Dynasty - and carried the story of an isolated prince requesting his own death as his empire fell into disarray. 

It was a complicated period in Chinese history, the bringing together of early states after centuries of bloodshed between warring factions emerging and being toppled by tribes quicker to evolve.

After conquering all of his rivals to unify China, Qin Shi Huang briefly sat atop the pile, presiding over a vast empire with an iron fist and carving out the first tentative shapes of what Chinese administration could look like.

Among his most notable achievements was the Great Wall of China, connecting walls built from the 7th century BCE into a powerful border protecting the empire from nomadic invaders. 

Qin had four princes ready to succeed him - Prince Gao, Prince Fusu, Prince Huhai and Prince Jianglu - but the dynasty would collapse immediately after his death.

After just 14 years, the fledgling state was thrown into a devastating civil war brought on by heavy resistance from forgotten classes.

Prince Huhai, the youngest, took up the mantle upon his father's death and purged the courts of his siblings.

According to the legend - one of very few surviving to the modern day - Prince Gao wanted desperately to flee the new terror, but feared as much the repercussions his family would have to endure.

So the story goes, Gao said he regretted not following his father into the afterlife and asked to die and be buried in the necropolis built for his father. 

Seizing a straightforward solution to his problem, the rising Prince Huhai accepted the deal, even offering 100,000 bronze coins for his burial.

The mausoleum, due 21 miles (35km) northeast of Xi'an - the former eastern edge of the historic Silk Roads - was built more than two millennia ago in 246BCE.

Owing to its scale and the care with which it was built, it survives today with thousands of terracotta statues still preserved in hundreds of nearby pits.

When archaeologists uncovered the tomb of the emperor, they feared it could still be filled with boobytraps designed to deter unwanted visitors. Sima Qian claimed the mausoleum was 'filled with rare artefacts and wonderful treasure'. To protect this, he wrote, 'craftsmen were ordered to make crossbows and arrows primed to shoot at anyone who enters the tomb'.

'Mercury was used to simulate the hundred rivers, the Yangtze and Yellow River, and the great sea, and set to flow mechanically,' he went on.

'Above were representations of the heavenly constellations, bellow, the features of the land. Candles were made from the fat of "man fish", which is calculated to burn and not extinguish for a long time.' 

Today, tourists still travel to the city to see the lifelike statues of fierce warriors, horses, chariots and weapons - a rare insight into the lives and priorities of those living millennia ago.

The preservation of such relics has helped historians gather huge detail on the life of China's first emperor, with many books being written about his transformation of a region embroiled in warfare into the semblance of a modern state.

His legacy is the creation of the bureaucratic and administrative structures still seen in China today, even beyond attempts to intentionally unsettle and displace the order of old.

As American political scientist Francis Fukuyama framed it, the period saw the transformation of China for a series of tribes into modern states complete with organised armies, mechanisms for tax collection and new philosophies on the purpose and reach of government.

The historical record provides not only a window into the ancient world, then, but context to help understand the present. 

The Qinshihuang Mausoleum - built for the ascending Emperor as he embarked upon his campaign of conquering neighbouring states from 246BCE - consists of a large outer wall, stone armour, a smaller inner wall and a number of offices surrounding the central tomb.

The centre of the complex was designed to mirror the urban plan of the capital, Xianyan, according to UNESCO.

It must have taken decades to construct, the level of detail showing the wealth and status of Qin Shi Huang and those buried alongside him.

Indeed, even the terracotta warriors to his east, built to protect him in the afterlife, are all different, built with painstaking care from clay and sculpted into realistic figures by hand.

Protected on all sides, the complex remained hidden until 1974.

The primary concern since has been damaging the structure - though as late as last year fears remained about the possibility of lethal boobytraps.

And so, permission to carefully sweep away the dust and extract delicate artefacts has been given with caution. 

'Every time we unearth anything there will be a lot of risk assessment... but if we look at the trend I can say that it seems there are more possibilities for us actually to do that, Associate Professor of Classical Chinese and Medieval China at Oxford University told MailOnline.

Ted says that while better technology is making it easier for us to dig with caution, the tombs in Xi'an may indeed have the additional challenge of traps, as laid out in Sima Qian's work.

Testing of the soil around the site has revealed mercury traces 100 times higher than normal - lending some credence to the myth.

Preliminary work has been carried out on the (possible) tomb of Prince Gao already, with items dated to the late Qin period.

It means they could have only been buried within the first three or four years of Qin's death, according to The Times.

A skull found in the tomb was revealed to belong to a male. And a premolar found in it was in good condition, with implications the owner was between 18 and 22-years-of-age, and well-nourished.

Experts say this is consistent with it belonging to Prince Gao - but more evidence will be needed to be conclusive.

Some experts are skeptical. Jiang Wenxiao suggested that the tomb could 'belong to a high-ranking nobleman or army chief', as reported by The Times.

Relics found in and around the tomb so far give some indication of status in life. The coffin, badly-decayed, was found surrounded by weapons, armour and various household items intended for use in the afterlife.

Some 6,000 bronze coins were also found alongside the casket, as well as jade treasures and gold and silver camels. Until now, they had only been associated with later periods in Chinese history.

Ted finds this quite exciting. 'The golden camels is a very interesting things. Normally when we think about golden camels we often associate that with the Tang Dynasty, so way later. And that is the time when we think about China embracing cosmopolitanism. This is basically the time when there's more cultural exchange around the world.

'But with the fact that we can see the golden camels here at this site may lead us to actually rethink [what we know] about the cultural exchanges - happening in a much earlier era.

'The historical record doesn't really give us too much about cultural exchanges happening during that time... so in that sense it does help us a lot [the discovery of new relics] in conceptualising and understanding what is going on in terms of cultural exchange during that time, and how it changed in terms of the aesthetics.'

Camels from the Gobi Desert would not have been found within the territory of the Qin Dynasty. While we understand the Silk Roads dug out under the Han began the process of creating a more globalised China, trading with the world, the design and materials suggest some may have been travelling north earlier than we believed.

The story of Prince Gao is harder to verify. Identifying evidence might look like a personal seal belonging to Prince Gao, or some other record that matches with Sima Qian's history.

Until then, we are left with inference from Sima Qian's texts, and the apparent importance of the tomb.

'Who would be able to actually have a tomb that would copy the main tomb of the first emperor? It could be Prince Gao. The evidence that we have is the textual evidence that will point us to that,' Ted says.

'You do have to have a certain person who is close enough to the Emperor to be allowed to have accompanied him in the tomb.'

But the lack of clear records from the time, and the sudden collapse of the dynasty, makes it 'very tricky' to pinpoint who the tomb belongs to. 

The tomb was one of nine discovered in 2011. Half the world away, archaeologists continue to uncover secrets of the ancient world, constantly updating the historical record.

Whether or not the tomb belongs to Prince Gao, or to a nobleman, is to be seen.

But the truths they uncover will help us better understand where we came from - and in turn, ourselves.

Ted is pleased with the discovery, and the renewed interest in ancient history - allowed, in part, by the technological developments of our age.

'I think history offers us very different things. One is a guide to the future and what will happen next. But the other thing that always fascinates me is that it's almost like a story.

'There are common interests or common mysteries you will find in it. It's not about which culture you belong to... it's not only a project that would attract an audience from China. It's attracting an audience worldwide to think about what humanity as a whole has achieved.'

While it was written down 2,000 years ago, the legend of Prince Gao remains familiar to us even today. It is a story of family, of triumph and defeat, of threat and sacrifice. Thematically, it remains interesting to a global audience because it tells us as much about who we are as who they were.

True or not, these ancient legends and the importance we give to them reveal something about how we perceive ourselves, our human fallibilities and intrigues, and the commonalities through the ages that bring us closer together. 

Today, we are fortunate to have a group of keen archaeologists still working to verify the past and understand the stories we tell about ourselves, Ted says. 

'At a time when we are seriously doubtful about the truth', the 'heroes' of this story - he says - are the people who have given their lives in the present to better understanding the past.