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 names the city is known in those languages). The name was then Latinized by replacing the Celtic neuter nominative ending "-on" by its Latin equivalent "-um",a common use noted also in Gaul and Lusitania. Various place names, such as Évry, Ivry, Ivrey, Ivory and Ivrac in France would all come from "*eburacon / *eburiacon"; for example: Ivry-la-Bataille (Eure, "Ebriaco" in 1023–1033), Ivry-le-Temple ("Evriacum" in 1199) Évry (Essonne, "Everiaco" in 1158), etc. The Roman conquest of Britain began in 43 AD but advance beyond the Humber did not take place until the early 70s AD. This was because the people in