Following the arrival of the Legio XX Valeria Victrix at the end of the 1st century the walls were reconstructed in sandstone, and building work continued, with interruptions, until the Roman circuit of the walls was completed over 100 years later.
The walls were reconstructed in sandstone. This was following the arrival of the Legio XX Valeria Victrix at the end of the 1st century. Building work continued. This was with interruptions. The Roman circuit of the walls was completed over 100 years later.