Pompeii was a Roman city. Now it is a UNESCO World Heritage Site.
On 24 October, 79 AD, a volcano called Mount Vesuvius erupted and destroyed the city and its people, killing 2,000 of them.
Pompeii is now considered one of the world's most important historical sites because of the way the volcanic ash preserved the city and its people. This gives historians and archaeologists a vivid picture of life in the Roman Empire around 2,000 years ago.