The interest in 'ancient' Britain can be traced back to the sixteenth and seventeenth centuries, following the pioneering work of the likes of William Camden, John Aubrey, and John Evelyn. The rediscovery of Britain's past was also tied up in the nation's emerging sense of importance as an international power. Antiquarians and archaeologists, notably William Stukeley, were conducting excavations of megalithic sites, including Stonehenge and the nearby Avebury. Their findings caused considerable debate on the history and meaning of such sites, and the earliest depictions reflected a search for a mystical explanation.