Although it is not known exactly why Stone Circles and Standing Stones were constructed, there have been many theories offered.
The most popular one is associated with Ley Lines and Earth Energy Lines. It is scientifically accepted that there is electromagnetic interference in and around many of these sites at particular times of the day or year, no concrete scientific evidence or research as yet has uncovered an explanation for this anomaly.
Across the United Kingdom and some parts of Europe there are still remains of many Stone circles but it is known that many were destroyed over the centuries to use in the construction of roads and walls. Added to this it is also reported that some Stone Circles were destroyed to make way for Christian churches, as these sites were originally believed to be used by Pagans, Druids and their contemporaries before Christianity came to Europe. Many of the oldest churches are reported to have been constructed upon the very site where a Stone Circle or some form of ancient pre-christian religious site once stood. Added to this some of the churches then used some of the stones in the construction of the churches!
Although it is not known exactly why Stone Circles and Standing Stones were constructed, there have been many theories offered.