The third element is a vast water basin or artificial lake, the Sahrij Swani or Sahrij Souani (also sometimes called the Agdal Basin).[1][2][3] The nearly rectangular basin measures 148.75 by 319 meters and is 1.2 meters deep on average.[4] Although the basin was apparently also used for leisure by palace residents who bathed here or wandered around on small boats, its purpose appears to have been primarily utilitarian and integrated to the royal city's water supply.[19][25][8] It was supplied with water by the adjacent House of the Ten Norias on its southeast side.[8][25] In this regard it resembled the water basin in the Menara Gardens of Marrakesh.[25] Possibly because of its importance, it was enclosed by its own two-meter-thick defensive wall, of which only a small section remains to the southwest (separating it from the Beni Mohammed neighbourhood beyond).[8][25]