Cairo - Ibn Tulun Mosque

From the Midan Salah el-Din Shari el-Saliba leads southwest to the Ibn Tulun Mosque, the second oldest in Cairo. Built in 876-879 by Ahmed ibn Tulun on the 65ft/20m high rocky plateau of Gebel Yashkur and modeled on the Kaaba in Mecca, it was then the largest mosque in existence. The outer walls, almost without decoration, are topped by crenelations.