Colchester Castle is a historic Norman castle located in the town of Colchester, Essex, England. Built in the 11th century, the castle is one of the largest and most complete Norman castles in Europe. It is a Grade I listed building and a Scheduled Monument, and
From Wikipedia
Colchester is a city in north-eastern Essex, England. At the 2021 census the built up area had a population of 130,245, making it the second-largest settlement in Essex, after Southend-on-Sea. It gives its name to the wider Colchester local government district which also covers an extensive surrounding area. The demonym is Colcestrian.