Western Wall or Wailing Wall
As for Jews, this wall is the wall to lament the destruction of the Jewish Synagogue. Jews do not believe that this wall were destroyed because that's where dwells "Shekhinah" (divine presence). Thus, praying there was tantamount to pray to the Lord.
So the original wall has a length of about 485 meters, and now the rest is just 60 meters to the world is regarded as one of the walls of the most historic and influential ever.