As China's only female emperor, Wu Zetian worked her way up to a position of power and prominence during the Tang Dynasty, establishing a legacy that would last thousands of years. One of history's most successful and controversial rulers, Wu Zetian married two emperors, birthed a couple more, and got rid of anyone that stood in her way. The line between fact and fiction with Wu Zetian is blurry, but stories about her life and rule are fascinating.