Western Stone
The Western Stone is a monolithic ashlar forming part of the lower level of the Western Wall in Jerusalem. This largest stone in the Western Wall is visible within the Western Wall Tunnel. It is one of the largest building blocks in the world.Dimensions
Exposed face
The stone's exposed face can be freely measured and is long and high, but its width, or depth, is hidden within the wall.Depth
In June 2006, Harry M. Jol, from the University of Wisconsin–Eau Claire, performed measurements with ground-penetrating radar to determine the depth of the stone. The conclusion of his team was that its depth ranges from approximately. Prior estimates ranged up to 16.5m.Weight
The calculated weight of the stone block is of 250–300 tonnes, based on Jol's measurement. Prior to the Jol's GPR measurement, the stone was estimated to weigh between 550 and 600 tonnes.Pre-2006 estimates
A previous estimate of the stone's depth was, a multiple of the GPR measurement, and led to a calculated total weight of 567 tonnes.; Other pre-2006 sources circulated similar figures, namely 550 to 600 tonnes. The Western Wall Heritage Foundation website indicates, as of March 2020, an estimated depth of, with an estimated weight of "several hundred tons", thus moderating its former estimated weight of 517 tonnes ;Location
The stone is located in a section of the Western Wall north of Wilson's Arch, below ground level, and can be accessed through the Western Wall tunnels. It is part of the "Great Course", a name used by the WWHF for the tallest and longest course of the Western Wall. Its stone blocks are of Herodian age, and the stones next to the Western Stone are, in sequence,,, and long, respectively.