This is a quote from one of my favorite books about Delhi called "City of Djinns" by William Darymple

"Delhi, said Pir Sadr-ud-Din, was a city of djinns. Though it had been burned by invaders time and time again, millennium after millennium, still the city was rebuilt; each time it rose like a phoenix from the fire. Just as Hindus believe that a body will be reincarnated over and over again until it becomes perfect, so it seemed Delhi was destined to appear in a new incarnation century after century. The reason for this, said Sadr-ud-Din, was that the djinns loved Delhi so much they could never bear to see it empty or deserted. To this day every house, every street corner was haunted by them. You could not see them, said Sadr-ud-Din, but if you concentrated you would be able to feel them: to hear their whisperings, or even if you were lucky, to sense their warm breath on your face."