Norham Castle settled
1121 CE.
Shown on the map at 55.722°, -2.151°.
Norham Castle (sometimes Nornam) is a castle in Norham, Northumberland, England, overlooking the River Tweed, on the border between England and Scotland. It is a Grade I listed building and a Scheduled Ancient Monument. The castle saw much action during the wars between England and Scotland.
Text from the Wikipedia article Norham Castle, licensed CC BY-SA 4.0.