Walls

At 1.700 years old, Hadrian's Wall is practically brand new, compared to Stonehenge. It was essentially a single castle that spanned the entire width of England, situated where it could protect Roman Britain from the Celt's up north in what is now Scotland.

The Romans constructed thick walls by precisely cutting and stacking stone for both outer faces of the wall, and then filling the interior with rubble of any kind that was available. If you examine the ruins of later (Norman) cathedrals you will find the same construction with beautiful precision-cut outer faces and very rough-fitting rocky debris on the interior.

Looking at the city walls of York, at the bottom you can clearly see the initial stones of the Roman wall (very irregular) . On to this were later added the small regular stones of the Anglo-Saxons. The large blocks in the upper half of the wall were the result of further Norman construction. A section of castle wall in Edinburgh.