The 13C walls follow the line of the old Roman fortification to the north of the cathedral and are built on the defensive embankment built by the Vikings. The Normans built fortified gates in the talus, known as bars today, where certain roads leading to the city still end today. From Bootham Bar, the walls go around the deanery garden up to Monk Bar and Aldgate. After Skeldergate Bridge and Baile Hill, continue to Micklegate Bar, the gate by which the king used to enter York.