Colchester Castle information
Built in 1076 on the foundations of the Roman Temple of Claudius, England’s largest surviving Norman keep is bigger than that of the Tower of London. Over the centuries it’s been a royal residence, a prison and home to a Witchfinder General. Now a £4-million restoration has brought 21st-century technology to its 11th-century walls. Look out for mobile phone apps and tablet hire, and a cracking son et lumiere re-creating lost internal structures and bringing the building’s history to life.