I made this drawing during a trip to Jebel Haroun, in Summer 1996. The shrine, supposedly built on Aaron's tomb, is divided in four parts: the cenotaph in front of the entrance, the mosque with the mihrab (niche) under the dome, the room with the 'blessed' black stone behind the praying room, and a fourth part which accommodates the staircase leading down to Aaron's burial chamber. The building dates to the 13th century. 

As I was always busy with classical monuments, I never had the chance to study a medieval building. I  had little experience and I saw them with the fresh eye of the visitor. One thing that strikes me in the Middle East, especially in the Shobak castle (an important medieval castle 10 kms north of Petra) which changed hands so many times, is that you never know, if you have not studied the monuments, whether the acute (pointed) arch is a gothic arch built by the Crusaders or an Islamic arch.