Many of the Roman walls were knocked down by William the Conqueror and used to build St Albans Abbey, otherwise known as St Albans Cathedral. The town had many notable buildings but most were knocked down by Henry VIII. The only building left is the abbey. Though many other buildings have been built nearby Ye Old Fighting Cocks, which claims to be the oldest pub in the UK, a Roman amphitheatre and hypocaust floor, a disused bear baiting square in Verulamium Park, and the imposing Rats Castle at the top of Hatfield Road as well as Roman Verulanium Muesuem 