Don Luis de Santa María Nanacacipactzin, also known as Cipac, was the last tlatoani ("king") of the Nahua altepetl of Tenochtitlan, as well as its governor (gobernador) under the colonial Spanish system of government. The previous ruler Cristóbal de Guzmán Cecetzin having died in 1562, Nanacacipactzin was installed on September 30, 1563, and ruled until his death on December 27, 1565.