ALT Black and white sketch depicting an aerial view of Roman Colchester. The town, encapsulated by a large wall featuring crenellations and a prominent gateway, is organised in a grid-like street system. Outside the wall, a main road forks in two directions: to the left, it continues straight into the open countryside, while to the right, it leads to a cluster of organically-arranged buildings outside the city wall. The outer buildings give way to open fields along the fringes.