Wales has more castles per head than anywhere else in the world. Designed by Norman conquerors to secure areas of land quickly and cheaply. Constructed to present as daunting a challenge to attackers ...

These changes transformed the Tower of London into England’s largest and strongest concentric castle — a castle containing ...

Dug into the White Cliffs of Dover’s Eastern Heights, below the Pharos, England’s first lighthouse and tallest Roman remain (40ft), and England’s first concentric castle, built by Henry II ...