SAUDI ARABIA AT THE HEIGHT OF THE PILGRIMAGE, MILLIONS ARRIVE IN MECCA FROM ALL CORNERS OF THE WORLD. SO VAST IS THE CONGREGATION THAT THE GREAT COURTYARD OF THE SACRED MOSQUE IS FILLED WITH MORE THAN 500,000 PEOPLE AT A TIME. ALL MUST CIRCUIT THE KA'BAH, WHICH IS DRAPED IN THE BLACK AND GOLDEN TAPESTRY OF THE KISWAH.