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After lying hidden beneath metres of volcanic rock and ash for 2,000 years, a "once-in-a-century" find has been unearthed in the ancient Roman city of Pompeii in Italy.

The temperature of the pyroclastic flows that buried Herculaneum and Pompeii was several hundreds of degrees Celsius, hot enough to easily burn and destroy soft tissue.

The massive eruption of Vesuvius engulfed Herculaneum and nearby Pompeii where up to 20,000 people lived.

Dan, who created the video of Pompeii, says he recognises a lots of details in his videos are historically inaccurate.

Hundreds of carbonised scrolls were discovered in Herculaneum, which like its neighbour Pompeii was buried beneath metres of volcanic ash.