Bibracte

Listen for a moment. Wind moves through the high beech trees, and dry leaves shift underfoot. The air up here is cooler than in the valleys below. Light falls through the canopy in pale green patches. It is hard to believe that this quiet forest on Mont Beuvray once held one of the great towns of Celtic Gaul... a place of smiths, merchants, priests and politicians, with smoke rising from hundreds of workshops.

This is Bibracte, the hilltop capital of the Aedui. The Aedui were one of the most powerful Gallic peoples, and their lands covered much of what is now Burgundy. Archaeologists call a fortified town like this an oppidum. That is a Latin word the Romans used for the large walled settlements they found across Gaul. Bibracte grew to fill this mountain top during the last two centuries before Christ, and it became a centre of trade, craft and power.

We know its name because of one famous visitor. Julius Caesar wrote about Bibracte in his account of the Gallic Wars. He described it as the largest and richest town of the Aedui. In 58 BCE he fought a major battle against the Helvetii, a migrating people from the Swiss plateau, somewhere in this region. The battle carries the town's name, although its exact location is still debated.

Here is the first surprise. In 52 BCE, the great Gallic uprising against Rome came to a turning point on this very hill. An assembly of Gallic peoples met at Bibracte. They confirmed Vercingetorix, the young chief of the Arverni, as the leader of the whole revolt. For a short time, this mountain stood at the heart of Gaulish resistance. Months later, the revolt ended in defeat at Alesia, further to the north east.

And then comes the second twist. After his victory, Caesar spent the following winter here, at Bibracte. Historians believe that he worked on parts of his famous commentaries during his stay. So the town that crowned Rome's greatest enemy also became a desk for the man who defeated him. As you walk the paths, think of Roman officers and Gallic nobles sharing the same muddy streets.

The ramparts are the best place to imagine the scale of the old town. The Gauls built their walls in a style that Caesar called the murus gallicus, the Gallic wall. It was a framework of timber beams, fixed with long iron nails, packed with earth and faced with stone. Near the gate known as the Porte du Rebout, part of this wall has been rebuilt. You can see how the timber ends sit in the stone face, in neat rows.

The defences enclosed a very large area. There were in fact two rings of walls, an inner circuit and a larger outer one. The full circuit ran for several kilometres around the mountain. Inside, the town was divided into districts. Craft quarters stood near the gates, with metalworkers, enamellers and potters. Wealthier households lived further inside, and some later built houses in the Roman style, with courtyards and tiled roofs.

Walk through the forest and you will meet another remarkable find. Near the centre of the old town lies a monumental basin carved from pink granite. It was uncovered by excavators in the late twentieth century. The basin is a long, pointed oval, and its shape follows a careful geometric design. Nobody is entirely sure of its purpose. It may have been a public fountain, or it may have had a religious role. Its precision still puzzles researchers.

The story of the town did not end with Caesar, but it slowed. Around the end of the first century BCE, the Roman emperor Augustus founded a new city in the valley, called Augustodunum. Today we know it as Autun, about twenty five kilometres away. The population moved down to the new Roman city over the following decades. Bibracte was gradually abandoned. The forest returned, and the name was almost forgotten.

The mountain did keep one living tradition. For centuries, people from the surrounding villages climbed here for a great fair each spring. Locals say it echoed the old gatherings of Gallic times, although that link is hard to prove. Christian worship also came to the summit. A small chapel dedicated to Saint Martin stands near the top. According to local tradition, Saint Martin himself came here to preach against the old gods.

Scientific work began in the nineteenth century. A local scholar from Autun, Jacques-Gabriel Bulliot, dug here for many years and identified the mountain as Caesar's Bibracte. His nephew, the archaeologist Joseph Déchelette, continued his work. Then the site fell quiet for decades. Since the 1980s, large international teams have returned each summer. Students and researchers from across Europe still excavate here, so this is very much a working laboratory of Celtic history.

At the foot of the mountain, a modern museum presents the finds. It is a long, low building of stone and glass, designed to sit quietly in the landscape. Inside, you can see coins, jewellery, amphorae and everyday tools. The amphorae are large clay jars that carried Italian wine. Thousands of their fragments were found on the site. They show how much the Gallic elite valued Roman wine, long before Rome ruled here.

Before you leave, walk to the open ground near the summit if you can. On a clear day, the view runs across the rolling hills of the Morvan, an old granite massif covered in forests and pastures. Look down at the green valleys and imagine the roads that once climbed toward these gates. Feel the wind, listen to the beech leaves again... and remember that under the moss at your feet lies a whole buried town, still waiting to tell its story.