The decline of Roman Britain in early fifth century AD led to significant social and economic changes all over Britain. Whilst the latest datable inscription referencing "Eboracum" dates from 237 AD, 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 are known. Additionally, a small bone plaque from an inhumation grave bore the phrase ("Hail sister may you live in God").