- Discover the treasures of the Cotswolds at the Corinium Museum. Two years and five million pounds in the making, the Corinium Museum has been transformed into the must – see visitor attraction of the Cotswolds. Roman Britain’s second city Step through a triumphal arch to arrive in Corinium; second largest city in Roman Britain. Experience life as a Roman. Marvel at the stunning mosaics. Dress as a Roman soldier. Explore their artistry and engineering. Face to face with the Saxons Revealed to the world for the first time the Anglo-Saxons of Butlers Field, Lechlade. Re-united with their astonishing treasures. Our ancestors brought to life through forensically re-constructed heads. Wool, wealth and war Trace a path from the Iron Age to the English Civil War. A story of war, of wool, of royalty; of dissolved monasteries and of a local worthy’s rise from rags to riches.