The Romans Got There As Well
And what they built must have been as impressive as the castles, about 2000 years ago. The problem is that for one, more time has passed since they left what they called Britannia in 410 AD, then their finely chiselled stones were often reused (some even in the castles) and today some of their remains are found under houses that can't just be torn down to excavate more Roman foundations.
Hypocaust heating of the fort bath, found in a cellar in Chester
But enough remains to get a feeling for the former splendour. Like the
baths in Caerleon which would put some modern leisure centres to shame.
Main bassin in the Caerleon baths, 42 metres in length
Or the
arena in Caerleon, which albeit overgrown with grass still displays the wide diameter of the original structure, though not its height.
Roman arena in Caerleon
Caerleon was a legionary fort, not an auxiliary fortress like the ones at the Hadrian's Wall and the German
limes, and thus everything comes a bit larger. After all, a legion consisted of abut 5,000 men - not counting the slaves - and even if some of them were dispatched elsewhere most of the time, Caerleon was constructed to house the whole lot.
Barrack row at Caerleon fort
The Romans not only built two legionary forts at Caerleon and Chester (Deva) and littered Wales with auxuliary fortresses (one - Segontium - can be found in Caernarfon), they also built a town at Caerwent.
Flowers on the Roman east wall of Caerwent
What the Roman places had in common with the Norman castles were big walls. Makes you wonder why. *grin*