Religious parade standard from Iran. Neil MacGregor, Director of the British Museum, explores the development of faiths about 400 years ago, beginning with a standard from Iran that was carried at the front of processions as a symbol of the country's Shia faith. He also visits religious sites to reflect on the spiritual climate of the time. With contributions by Hossein Pourtahmasbi and Haleh Afshar. (Duration: 14 mins)