Eboracum over Britain. Whilst the latest datable inscription referencing "Eboracum" dates from AD237, the continuation of the settlement after this time is certain. Building work in the city continued in the fourth century under Constantine and later Count Theodosius. The locally produced Crambeck Ware pottery arrives in "Eboracum" in the fourth century – the most famous form being intricately decorated buff-yellow 'parchment ware' painted with bright shades of red. The effect of Constantine's religious policy allowed the greater development of Christianity in Roman Britain – a bishop of York named 'Eborius' is attested here and several artifacts decorated with chi-rho symbols
Eboracum the area known as the Brigantes by the Romans became a Roman client state. When their leadership changed becoming more hostile to Rome, Roman General Quintus Petillius Cerialis led the Ninth Legion north from Lincoln across the Humber. Eboracum was founded in 71 AD when Cerialis and the Ninth Legion constructed a military fortress (castra) on flat ground above the River Ouse near its junction with the River Foss. In the same year Cerialis was appointed Governor of Britain. A legion at full strength at that time numbered some 5,500 men, and provided new trading opportunities for enterprising local people,