The Aghlabid Cisterns are the only two remaining pools of a 15 pool water system that was among the most advanced in the world at the time. They were constructed under the orders of Prince Abu Ibrahim Ahmad in 862/248 AH under the supervision of Khalaf al-Fata, his emancipated slave. The Aghlabid Pools are composed of a small pool called all-Fisqiya (the reservoir), in the shape of a 17-sided polygon, and a larger cistern that is 4.8 meters deep. Sediments are allowed to settle out of the water in the small pool until a certain level is reached. At that point, it is transferred to the large pool through an opening known as esarh (the outlet). The water comes from rain and the wadi Merguell via a set of small dams and a canal.
Kairouan Rehabilitation Program On-site Review Report, edited by Aga Khan Award for Architecture, 1992.
The On-site Review Report, formerly called the Technical Review, is a document prepared for the Aga Khan Award for Architecture by commissioned independent reviewers who report to the Master Jury about a specific shortlisted project. The reviewers are architectural professionals specialised in various disciplines, including housing, urban planning, landscape design, and restoration. Their task is to examine, on-site, the shortlisted projects to verify project data seek. The reviewers must consider a detailed set of criteria in their written reports, and must also respond to the specific concerns and questions prepared by the Master Jury for each project. This process is intensive and exhaustive making the Aga Khan Award process entirely unique.