Now, here is a very beautiful and unusual story set in Egypt, one describing an astonishingly ambitious work of public art in a highly unusual place.

When I saw the headline -- "Sprawling Mural Pays Homage to Cairo’s Garbage Collectors" -- I immediately wondered if foreign desk at The New York Times was going to nail down the obvious religion hook in this story. Yes, this story contains a powerful religion ghost.

The headline raises two questions right off, one very obvious and one not so obvious: Who are the garbage collectors of Cairo? The second question: The implication of this tribute is that there is some organized or even natural mass of people who collect garbage in one of the most important cities in the Muslim world. Why is this?

Sure enough, there is a strong hint at the religion content at the very top:

CAIRO -- The intricate mural took shape over the past few weeks, little noticed at first, spreading across a harried quarter of Cairo where Egypt’s garbage collectors live, amid overflowing bundles of this overcrowded city’s trash.

By the time the painting was finished two weeks ago, it stretched across more than 50 buildings, making it the largest public work of art here anyone can recall. The mural, a circle of orange, white and blue in Arabic calligraphy, quotes a third-century Coptic Christian bishop who said, “If one wants to see the light of the sun, he must wipe his eyes.”

When the first photographs of the mural circulated, reactions ranged from astonished delight to disbelief. Some people, struck by its seemingly impossible scale, seemed convinced that the images had been digitally altered, according to the man behind the project, a Tunisian-French artist known as eL Seed.