In pictures: Egypt's hidden treasures

Hanging on by a thread to the side of a hill overlooking Cairo, is the ruined mosque and tomb of Shahin al-Khalawati.

Shahin was a pious man. He built the mosque in 1538 and stayed there until his death thirty years later, never descending to the hubbub of Cairo below.

All photos by Mohamed El Hebeishy from his book "Egypt Rediscovered".