The term "Tlatoani" refers to the ruler or king in the Aztec Empire, known for their political and military leadership. The Tlatoani was responsible for making important decisions, overseeing the administration, and leading the army in times of war. They were often seen as a divine figure, believed to be chosen by the gods to govern the people. The most famous Tlatoani was Moctezuma II, who ruled during the time of the Spanish conquest. The Tlatoani held significant power and was supported by a council of nobles, known as pilli, who assisted in governance and maintained the social order within the empire.