Dudley is part of the West Midlands conurbation, and is located south of Wolverhampton. It is the largest town in the Black Country. For many years the town (but not the castle) formed part of an exclave of Worcestershire entirely surrounded by Staffordshire. Dudley has a history dating back to medieval times. Dudley Castle has stood on a hill overlooking the town since the 11th century, and is mentioned in the Domesday Book. The present castle dates from the 13th century, and provided the centre around which the town grew. Dating from the 12th century are the ruins of St James Priory, set within the Priory Park.