Bab Agnaou, a 900 year old archway in the walls of Marrakesh, is caved of sandstone. We can still see the rich red oxidation in it, melding with the graying blue stone. When we look at such detail as this, we take the subject out of its context. We see the intricate work of craftsmen long dead, still surviving after nearly a thousand years of enduring the Moroccan climate extremes. We see not the arch itself here. (You can see that by clicking on the thumbnail below.) Instead, this detail defines the nature of its builders.