The Western Stone is the biggest stone of the wall and it weighs around 517 tonnes. This stone is 13.6 meters long and 3 meters high and has an estimated width of 3.3 meters. Inside the tunnels, one can see many arches which belonged to bridges in the past. These bridges were built in line with the Temple Mount wall because the area below these bridges was much lower than the Temple Mount.
Part of the old ceiling which goes back to the Herod era and he expanded the Temple Mount area in 19 BC. the Second Temple was destroyed by the Romans in 70 AD thus burying this wall underground. British researcher Charles Wilson began the excavations in 1864 and was followed by Charles Warren in 1867-70.