Behind the Castle Hotel you will see a rare and unique survival in Britain of a non-defensive Roman wall. This was the north outer wall of the basilica, the Roman town hall.
The Mint Wall was originally 9m high and is about 1m thick. It is faced with small limestone blocks, has a rubble core and courses of tile to strengthen the structure. The square holes that you can see are called putlogs and held the timber scaffolding used during its construction.
The basilica was where business and legal activities took place; it was a central element of the Roman Forum.