Constructed by the Almoravids, it is the oldest of the mosques in Salé. It eventually fell into ruin and was built over. In the early-20th century, it was unearthed. In the 1960s it was reconstructed.
Source:
“Mosquée Lalla Chahba.” 2010. UNESCO, Ministère De La Culture Du Maroc, PASS Technologie. 2010. http://www.idpc.ma/view/pc_architecture/idpcm:D268ED. Archived at: https://perma.cc/CAL6-ZTHV.