The Western Wall (Hebrew: הַכּוֹתֶל הַמַּעֲרָבִי, romanized: HaKotel HaMa'aravi, lit. 'the western wall'; ; Ashkenazi Hebrew pronunciation: HaKosel HaMa'arovi) is an ancient retaining wall of the built-up hill known to Jews and Christians as the Temple Mount of Jerusalem. Its most famous section, known by the same name, often shortened by Jews to the Kotel or Kosel, is known in the West as the Wailing Wall, and in Arab world and Islamic world as the Buraq Wall (Arabic: حَائِط ٱلْبُرَاق, romanized: Ḥā'iṭ al-Burāq; ['ħaːʔɪtˤ albʊ'raːq]). In a Jewish religious context, the term Western Wall and its variations is used in the narrow sense, for the section used for Jewish prayer; in its broader sense it refers to the entire 488-metre-long (1,601 ft) retaining wall on the western side of the Temple Mount.
At the prayer section, just over half the wall's total height, including its 17 courses located below street level, dates from the end of the Second Temple period, and is believed to have been begun by Herod the Great. The very large stone blocks of the lower courses are Herodian, the courses of medium-sized stones above them were added during the Umayyad period, while the small stones of the uppermost courses are of more recent date, especially from the Ottoman period.