But then they become less tolerant under Shah Jahan and Aurangzeb. Shah Jahan famous for building the Taj Mahal for his wife, but what's often not noted is he was building this fairly grand mausoleum at a time when there was a famine in India, and he was also known as being fairly intolerant and persecuted many Hindus and Sikhs. And his son, Aurangzeb, continued to do so. Now, some historians will refer to these three empires as the gunpowder empires. If someone says gunpowder empires, I'm referring to these three. The reason why they're called that is this view that these major centralized empires were able to form only with the power of gunpowder. The Ottomans, famous for early use of artillery, the Mughals, Babur in particular, came to power with gunpowder.