Gosbecks, located about 4 km to the south of the walled town, was probably the centre of Iron Age Colchester and possibly the home of King Cunobelin.
The Romans took over the settlement at Gosbecks and built a temple, possibly dedicated to Mercury. This would have been a religious focus for the native population.
The Romans also built a huge theatre at Gosbecks in around AD 100. Gosbecks’ theatre is the largest known from Roman Britain, seating around 5,000 people. It was probably used with the temple for assemblies, speeches, religious rites and dramatic performances.
In around AD 275 the importance of the site declined. The theatre and the temple were abandoned and dismantled and the building materials were taken away and recycled.
Today, both the theatre and the temple have completely disappeared; only the outlines can be seen marked out on the ground.