The Marlborough Mound, also known as Merlin's Mound or Merlin's Mount, is a Neolithic monument in the town of Marlborough in the English county of Wiltshire. Standing 19 metres (60 ft) tall, it is second only to the nearby Silbury Hill in terms of height for such a monument. Modern study places the construction date around 2400 BC. It was first listed as a Scheduled Monument in 1951.