The monument is believed to be built back in 2500 B.C by the Archeologists. According to many theories, the date of the erection is still unknown where some consider it to be in 2200 B.C. and other saying it to be around 3000 B.C. But till date no such strong evidence shows the exact date of the monument being built. Since a long time there have been many questions regarding the reasons behind building of such a monument as well as location of the quarry of the stones.

But today archaeologists have been successful in finding the spot of the quarry of the huge stones. The location has been told to be as in Wales and it has been said that the extraction of the stones was done back in 2500 B.C. The enclosure which is about 1 acre in size is found on the Carn Menyn Mountain in the Preseli Hills. The discovery of the place is considered to have answered one of the mysteries of the world that attracted so many archeologists. The discovery was made after it was made sure that the origin of the blue stones can only be from one place only. Moreover the reason behind using such stones is considered to be the stones to be holy. Now with the help of chemical reactions as well as more tests, the exact spot of each stone would be found. The great discovery is made a year after the remains of band of brother was found. It is believed that they were responsible for the transportation of the blue stones. The discovery was carried by Prof Darvill who was researching on the mystery for the past 10 years.