A nilometer is a structure for measuring the Nile River's clarity and water level during the annual flood season in Egypt. There were three main types of nilometers, calibrated in Egyptian cubits: a v
Measuring shaft of the nilometer on Roda Island, Cairo built in 861 AD on the orders of the Abbasid Caliph al-Mutawakkil
Nilometer shown c.1800 at the southern tip of Roda Island
Palermo Stone, 5th Dynasty (2392 B.C.E-2283 B.C.E)
Conical structure covers the nilometer on southern tip of Roda Island in the Nile River at Cairo. The structure is modern but the nilometer dates from 715 AD.
The Amr ibn al-As Mosque is a mosque, located in the Fustat neighbourhood of Old Cairo, Egypt. Named in honour of the Arab Muslim commander Amr ibn al-As, the mosque was built in c. 642 CE as the cent
The mosque sahn in 1870. The arcaded colonnade still exists, while the central structure has undergone some changes over time. (Credit: Museo Egizio, Turin).
Interior of the mosque, in 1893
Interior of the mosque, prior to 1923