Editing Lancaster Castle (section)

==Background==
Between 60 and 73&nbsp;AD, [[Lancaster Roman Fort|a Roman fort]] was built at Lancaster on a hill commanding a crossing over the [[River Lune]].<ref>{{harvnb|Shotter|2001|p=3}}</ref><ref name="Champness 1">{{harvnb|Champness|1993|p=1}}</ref> Little is known about Lancaster between the end of the Roman occupation of England in the early 5th&nbsp;century and the Norman Conquest in the late 11th century. The layout of the town was influenced by the Roman fort and the associated civilian settlement; the main road through the town was the route that led east from the fort.<ref>{{harvnb|White|2001|p=33}}</ref> After the [[Norman conquest of England|Norman Conquest]] in the second half of the 11th&nbsp;century, Lancaster was part of the [[Earldom of Northumbria]]; it was claimed by the kings of England and Scotland. In 1092, [[William II of England|William&nbsp;II]] established a permanent border with Scotland further to the north by capturing [[Carlisle, Cumbria|Carlisle]]. It is generally thought that Lancaster Castle was founded in the 1090s on the site of the Roman fort in a strategic location.<ref name="Champness 1"/> The castle is the oldest standing building in Lancaster and one of the most important. The history of the structure is uncertain. This is partly due to its former use as a prison, which has prevented extensive [[archaeology|archaeological]] investigation.<ref name="White 42">{{harvnb|White|2001|p=42}}</ref>