Editor’s Note: This CNN series is, or was, sponsored by the country it highlights. CNN retains full editorial control over subject matter, reporting and frequency of the articles and videos within the sponsorship, in compliance with our policy . Istanbul CNN  —  Istanbul’s Grand Bazaar is one of the most bustling spots in one of the world’s greatest, busiest cities. Close to 50 million people pass through the 21 gates of the venerable marketplace each year, and up to 500,000 per day during peak