After the Romans left Britain in 410 AD, Durovernum Cantiacorum was abandoned, apart from a few farmers, and gradually decayed. Over the next 100 years, an Anglo-Saxon community formed within the city walls, as Jutish refugees arrived, possibly intermarrying with the locals. The Jutes named the city Cantwaraburh, meaning "Kent people's stronghold". In 597 AD, Pope Gregory the Great sent Augustine to convert King Æthelberht of Kent to Christianity. After the conversion, Canterbury, as a Roman town, was chosen by Augustine as the centre for an episcopal see in Kent, and an abbey and cathedral were built. Augustine thus became the first Archbishop of Canterbury. The town's new importance led to its revival, and trades developed in pottery, textiles and leather. By 630, gold coins were being struck at the Canterbury mint. In 672 the Synod of Hertford gave the see of Canterbury authority over the entire English Church.