Wu Zhou of the Tang Dynasty came into power when the emperor died and kao tsung took over.
As a ruler she pushed a campaign that elevated the position of women in the Tang Dynasty.
She made women stronger politically, created Buddhist temples across the Tang Dynasty, she started a women's movement that gave them more respect among the men of the Tang Dynasty.
Author Lyn Reese published in 2011 http://www.womeninworldhistory.com/heroine6.html
Emily mark published in December 28th 2007 http://www.ancient.eu/timeline/Wu_Zetian/
Author mike dash August 10th 2012 http://www.smithsonianmag.com/history/the-demonization-of-empress-wu-20743091/