The Oppidum: the birth of the first towns
p1The Age of Metals · PREHISTORY
🏔️ Settling on heights for protection
From around 600 BCE, the social climate in what is now France became more unstable. To protect themselves from attacks, populations left the plains and settled on natural high ground: plateaus or steep hills.
These fortified sites are called oppida (singular: oppidum). They are the ancestors of modern towns.
🧱 The Murus Gallicus (the Gallic wall)
To enclose these settlements, the Celts developed a unique fortification technique that even Julius Caesar admired: the Murus Gallicus.
- A framework of wooden beams assembled with large iron nails
- The gaps filled with earth and stones
- The outer face covered with dry stone masonry
This wall was highly effective: the wood absorbed the impact of battering rams, while the stone prevented the spread of fire.
Model of a Murus Gallicus (Lyon), showing the internal structure of wood and stone.
🏘️ A vibrant center of life
The oppidum was not just a fortress—it was a true urban center:
- Craft production: Entire districts were dedicated to blacksmithing, pottery, or weaving
- Trade: Markets were held there, and the first coins were minted
- Politics: The place where assemblies met and leaders resided
Sites such as Bibracte (on Mont Beuvray in Burgundy) or Gergovia (near Clermont-Ferrand) could host thousands of inhabitants.
🧠 Key takeaways
- An oppidum is a fortified town built on elevated ground
- The Murus Gallicus was an advanced wood-and-stone construction technique
- It marks the beginning of urban planning and Gaulish political organization
📸 Image credits
- Murus Gallicus — Nicolas Hirsch, CC BY-SA 4.0, via Wikimedia Commons