Colchester is a town in the county of Essex, in southeast England. In the Castle Park, Colchester Castle is a huge Norman keep, built on the foundations of a Roman temple. Its museum displays artefacts up to 2,500 years old. Also in the park is Hollytrees Museum, a Georgian townhouse displaying 3 centuries of clothing, clocks and decorative arts. Nearby, in the Dutch Quarter, are the remains of a Roman theatre.