Libya: Ghadames

Highlander says that the Libyan city of Ghadames ^[1] is renowned for its unique style of architecture, traditions and culture. Amongst these interesting traditions is the one found in a typical Ghadames home where a small peephole is made into the front door. A visitor would look through it inside the house at a reflection in a mirror hung on the wall opposite the door. This mirror reflects the picture of an oil lamp placed on a shelf.
There are 6 positions for the lamp, and these positions inform the visitor of what’s going on in this home and so help him to act/decide accordingly. Have a look at an artist's drawing and a brief explanatory text of what Highlander is talking about ^[2].