Prudhoe Castle is built on a steep sided rocky outcrop above the River Tyne. The barony of Prudhoe was granted to Robert d'Umfraville by Henry I after 1100, and a new castle was constructed on the site of an earlier fortification. Odinel d'Umfraville, who succeeded his father in 1145, was brought up in the home of Earl Henry, father of the Scottish king, William the Lion. Odinel rejected any Scottish loyalty and supported the English king, Henry II, when William the Lion invaded northern England in 1173-4. The Scottish king besieged Prudhoe in 1173 and again in 1174, but was unsuccessful on both attempts. Odinel and his force eventually captured the Scottish king outside Alnwick, where William was forced to sign the treaty of Falaise, recognising Henry as the superior lord of Scotland.