Sanjay Leela Bhansali's upcoming web series 'Heeramandi' is based on the lives of courtesans in pre-Independence India. Heera Mandi has a rich cultural history dating back to Mughal era. Located in the Walled City of Lahore, the area served as a vibrant cultural centre in the 15th and 16th centuries, entertaining the nobility with its refined courtesans and performers.