A short walk west from the Cityel leads to Mosque of Ibn Tulun founded in 876 as the religious center of a great military compound established by Ibn Tulun who was appointed governor of Egypt in 868.
The year of founding of the Mosque of Ibn Tulin is 900.
mnli hypothesis: The year of founding of the Mosque of Ibn Tulin is 900. premise: A short walk west from the Cityel leads to Mosque of Ibn Tulun founded in 876 as the religious center of a great military compound established by Ibn Tulun who was appointed governor of Egypt in 868.