You must have heard about Stonehenge, the world-renowned circle of stone columns, located in Wiltshire, England. But do you know the prehistoric monument may have had a brother, older and bigger than it? The discovery of new monument near Stonehenge was revealed on Monday by researchers from University of Bradford.

According to the researchers, they found the monument, which has about 100 stones, built about 4,500 years ago. The researchers working on the Stonehenge Hidden Landscapes Project discovered the historic monument with the help of remote-sensing technologies. The monument, also known as 'superhenge', has been found near Durrington Walls.

Taking to The Guardian newspaper, Vince Gaffney, an archaeologist at Bradford University and lead researcher of the project, said the newly discovered monument is the largest seen stone monument in Britain and Europe.

The researchers said the evidence of the monument was discovered 3 feet under earth. Some of the circle's stones could be 15 feet tall. Wolfgang Neubauer, the Ludwig Boltzmann Institute for Archaeological Prospection and Virtual Archaeology, said the researchers used high-resolution ground-penetrating radar whose data showed that there is a row of about 90 stones. The data revealed that there is a massive bank placed over the stones, Neubauer added.

Neubauer said, "In the east, up to 30 stones … have survived below the bank whereas elsewhere the stones are fragmentary or represented by massive foundation pits". The discovery was revealed at the British Science Festival being held at the University of Bradford.