Colchester Castle built
1069 CE.
Shown on the map at 51.891°, 0.903°.
Colchester Castle is a Norman castle in Colchester, Essex, England, dating from the second half of the eleventh century. It is located in, and gives its name to, Castle Park. The keep of the castle is mostly intact and is the largest example of its kind anywhere in Europe, due to it being built on the foundations of the Roman Temple of Claudius. The castle endured a three-month siege in 1216, but had fallen into disrepair by the seventeenth century when the curtain walls and some of the keep's upper parts were demolished; its original height is debated. The remaining structure was used as a prison and was partially restored as a large garden pavilion, but was purchased by Colchester Borough Council in 1922. The castle has, since 1860, housed Colchester Museum, which has an important collection of Roman exhibits. It is a scheduled monument and a Grade I listed building.
Text from the Wikipedia article Colchester Castle, licensed CC BY-SA 4.0.