This Norman castle is laid on the foundations of the Roman Temple of Claudius, destroyed in AD60 by Queen Boudica when she razed Colchester. The castle walls have reused many roman materials and compose, not only the largest keep built in Britain but also the oldest surviving in Europe. Inside, exhibitions span 2000 years of British history, with many interactive displays to entertain all ages. Visitors can learn about Witchfinder General, Matthew Hopkins who used the castle as a gaol, feel heavy chain mail and touch Roman pottery.