Masjid Al Ahmed Ibn Tulun Cairo

Construction on this grand mosque began in 876 AD and was completed in 879 AD by Ahmad ibn Tulun, the Abbasid governor of Egypt. Its design was inspired by the Abbasid architecture prevalent in Samarra, Iraq, at the time. Notably, it's the largest mosque in Cairo in terms of land area and is admired for its unique minaret featuring an external spiral staircase. The Mosque of Ibn Tulun is considered one of the most significant examples of Abbasid architectural style in Egypt and largely retains its original form.