It lies on the course of a Roman road, Icknield Street, which is now the site of the present Queen Elizabeth Hospital and the University of Birmingham in Edgbaston. The fort was constructed soon after the Roman invasion of Britain in AD 43. The fort was around in area and was defended by a turf and earth bank with a timber wall, towers and double ditches. Within the fort were timber buildings including barrack blocks, a granary, a workshop and a store. In AD 70, the fort was abandoned, only to be reoccupied a few years later before being abandoned again in AD 120.