Kidwelly Castle built
1106 CE.
Shown on the map at 51.739°, -4.306°.
Kidwelly Castle (Welsh: Castell Cydweli) is a ruined castle overlooking the River Gwendraeth and the town of Kidwelly, Carmarthenshire, Wales.
Text from the Wikipedia article Kidwelly Castle, licensed CC BY-SA 4.0.