Manorbier Castle is an 11th century Norman castle located five miles south-west of Tenby in Pembrokeshire, South Wales, in the village of Manorbier. The castle was originally built as a wooden hall with earthwork defences on land granted to Odo de Barri, a Norman knight, at the end of the 11th century. William de Barri, Odo's son, began work on a stone structure in the first half of the 12th century. Portions of this 12th century building remain today.