What happened to the Roman city of Pompeii in AD 79?

The Day Pompeii Disappeared

On the morning of August 24th, AD 79, the people of Pompeii had no idea they were living their last hours. The city was a thriving Roman hub on the Bay of Naples, home to roughly 11,000 people — merchants, gladiators, bakers, and aristocrats all going about their daily business. Then, just after midday, Mount Vesuvius tore itself apart.

What Actually Happened During the Eruption

The eruption wasn't a slow, creeping disaster. Vesuvius sent a column of superheated ash, pumice, and gas an estimated 33 kilometres into the sky — so high it was visible across the entire region. The Roman writer Pliny the Younger watched from Misenum, about 30 kilometres away, and described the cloud as resembling a giant pine tree. His vivid letters to the historian Tacitus remain some of our best eyewitness accounts of the catastrophe.

For hours, pumice rained down on Pompeii, collapsing roofs and forcing people to tie pillows to their heads for protection. Many fled. Many didn't make it. Then came the pyroclastic surges — avalanches of superheated gas and volcanic material travelling at lethal speed. These killed the remaining inhabitants almost instantly, reaching temperatures hot enough to vaporise soft tissue within seconds.

Buried and Forgotten

By the time Vesuvius quietened, Pompeii lay under roughly four to six metres of ash and pumice. The city wasn't just damaged — it was erased from the landscape. Over the following centuries, it was largely forgotten, its location lost beneath farmland and a thin layer of history.

It wasn't until 1748 that serious excavations began under the direction of King Charles III of Naples. What archaeologists found was extraordinary: a city frozen in time. Food still sat in jars on market counters. Election slogans were painted on walls. Graffiti — some of it surprisingly rude — was scratched into plasterwork. The volcanic ash had acted like a time capsule, preserving organic material that would otherwise have rotted away over two millennia.

The Famous Plaster Casts

Perhaps the most haunting discovery came in the 19th century, when archaeologist Giuseppe Fiorelli realised that voids in the hardened ash were actually the outlines left by decomposed human bodies. By pouring liquid plaster into these cavities, his team created eerily lifelike casts of Pompeii's final victims — people frozen in their last moments, curled up, shielding their faces, or simply collapsed where they fell.

Why Pompeii Still Matters

Pompeii gives us something almost no other ancient site can: an unfiltered snapshot of everyday Roman life. Not just temples and forums, but homes, taverns, brothels, and bakeries. It tells us what ordinary people ate, how they decorated their walls, and how a city actually functioned nearly 2,000 years ago. The tragedy of its destruction became, in an unlikely twist, the greatest gift to our understanding of the ancient world.