Mamilla (Hebrew: ממילא) is a neighbourhood of Jerusalem that was established in the late 19th century outside the Old City, west of the Jaffa Gate. Until 1948 it was a mixed Jewish-Arab business district. Between 1948 and 1967, it was located along the armistice line between the Israeli and Jordanian-held sector of the city, and many buildings were destroyed by Jordanian shelling. The Israeli government approved an urban renewal project for Mamilla, apportioning land for residential and commercial zones, including hotels and office space. The Mamilla Mall opened in 2007.
The neighbourhood of Mamilla is located within the northwest extension of the Hinnom Valley, which extends from the southwest corner of the Old City along the city's western wall. The neighbourhood is bounded by the Jaffa Gate and Jaffa Road to the east and north, the downtown and Rehavia neighbourhood above it to the west, and Yemin Moshe's upward slope along its southwestern edge. Its total area is 120 dunam (0.12 square kilometres (0.05 sq mi)).
The now dry "Mamilla Pool", with a capacity of 30,000 cubic metres, was probably built by Herod the Great. An underground channel connected it to Hezekiah's Pool, situated inside the city walls and in immediate proximity to Herod's royal palace. Herod is known to have built the Pool of the Towers (probably identical to Hezekiah's Pool) and the Serpent's Pool (Birket es-Sultan, Sultan's Pool), which were both fed by aqueducts coming from the Mamilla Pool.