Foundations and First Mentions
While the origins of the settlement can be traced back to the Roman era, when an auxiliary fort was built here around 75 AD, the actual birth of the town of Caerphilly is inextricably linked to the Middle Ages. The town's name comes from the Welsh word "Caer" (fortress or fort) and, presumably, the name of Saint Ffili.
The official starting point of the town's history is considered to be 1268, when the Norman lord Gilbert de Clare began the construction of a grand castle. It was around this stronghold that a permanent settlement began to form, eventually growing into the modern town.
Key Factors in Its Establishment
- Political Rivalry: Caerphilly emerged as a strategic response by Norman lords to the growing power of the Welsh Prince Llywelyn the Last. The town was established as a military outpost to protect conquered lands in South Wales.
- Geography and Landscape: Its location in a natural basin allowed for the creation of a unique water-based defense system around the castle, utilizing local rivers and streams. This made the site ideal for defense and for controlling the routes north of Cardiff.
Early Cultural and Economic Features
In the first centuries of its existence, Caerphilly's economy was entirely geared toward serving the garrison. It was a typical "castle town," inhabited by stonemasons, blacksmiths, and provision merchants necessary for maintaining the fortress.
The early history of the settlement was characterized by instability: the town was repeatedly attacked and destroyed during Welsh uprisings, notably during the revolt of Owain Glyndŵr in the early 15th century. Only after military tensions subsided did Caerphilly begin to develop as a regional trade center.