#ahmad ibn tulun

Inner arches of Ibn Tulun mosque in Cairo, Egypt. The mosque was commissioned under the rule of Ahmad ibn Tulun (Abbassid governor of Egypt from 868–884), designed by the prominent Egyptian architect Saiid Ibn Kateb Al-Farghany (a Christian Orthodox architect and engineer who designed the Nilometer), constructed in the Samarran style common with Abbasid constructions. It’s the oldest mosque in Egypt surviving in its full original form, and the largest mosque in Cairo. Photogravure by Martin Hürlimann (Swiss publisher and photographer) in 1937.