Photo feature by Abdulaziz Faisal

CAIRO, July 17 (KUNA) -- The Nilometer, located in the Egyptian capital Cairo, still stands to this day as a classical Islamic architectural wonder.
Constructed by Abbasid caliph Al-Mutawakkil in the ninth century A.D., the Nilometer was used to measure water level of the River Nile.
Later on, an Ottoman-style dome was erected over the three-level Nilometer in 1925.
The Nilometer measures the level of the water using a-10.5-meter pillar placed in the middle of the structure. (end) aff.gta