Mumtaz was one of the three wives of Mughal emperor Shah Jahan I, his constant companion and trusted confidant—and his favorite. She died during the birth of their fourteenth child, while accompanying him on a military campaign. According to legend, her dying wish was for there to be built a monument to their love. The bereaved emperor soon began to plan a magnificent mausoleum for his late wife, a structure that would take more than 20 years to complete and become what world-famous building? Discuss