How did the "Western Wall " survive for almost three thousand years of wars and destruction?
The answer lies in an ancient Jewish Midrash. "Behold - He stands behind our wall'' - this refers to the Western Wall of the Temple. Why so? Because God has sworn that it will never be destroyed." [Midrash Raba, Song of Songs 2:4]
Source: Evidence for Torah - A website which I just discovered and is well worth a visit.