is a small fort () Duroliponte on Castle Hill, just northwest of the city centre around the location of the earlier British village. The fort was bounded on two sides by the lines formed by the present Mount Pleasant, continuing across Huntingdon Road into Clare Street. The eastern side followed Magrath Avenue, with the southern side running near to Chesterton Lane and Kettle's Yard before turning northwest at Honey Hill. It was constructed around AD 70 and converted to civilian use around 50 years later. Evidence of more widespread Roman settlement has been discovered including numerous farmsteads and a village in the Cambridge district of Newnham. A Roman coffin for Etheldreda was found next to the Roman town, and taken back by river for her burial in Ely. (Bede) Medieval Following the Roman withdrawal from Britain around 410, the location may have been abandoned by the Britons, although the site is usually identified as , as listed among the 28 cities of Britain in the History of the Britons attributed to Nennius. Evidence exists that the invading Anglo-Saxons had begun occupying the area by the end of the century. Their settlement – also on and around Castle Hill – became known as Grantebrycge. ("Granta-bridge"). (By Middle English, the settlement's name had changed to "Cambridge", deriving from the word 'Camboricum', meaning 'Passage' or 'ford' of stream in a town or settlement, and the lower stretches of the Granta changed their name to match.) Anglo-Saxon grave goods have been found in the area. During this period, Cambridge benefited from good trade links across the hard-to-travel fenlands. By the 7th century, the town was less significant and described by Bede as a "little ruined city" containing the burial site of Æthelthryth (Etheldreda). Cambridge was on the border between the East and Middle Anglian kingdoms and the settlement slowly expanded on both sides of the river. The arrival of the Vikings was recorded in the Anglo-Saxon Chronicle in 875. Viking rule, the Danelaw, had been imposed by 878 Their vigorous trading habits caused the town to grow rapidly. During this period the centre of the town shifted from Castle Hill on the left bank of the river to the area now known as the Quayside on the right bank. After the Viking period, the Saxons enjoyed a return to power, building churches such as St Bene't's Church, wharves, merchant houses and a mint, which