Final answer:
Cuauhtémoc was the last Aztec emperor tortured by the Spaniards after the fall of Tenochtitlan, marking the end of the Aztec Empire.
Step-by-step explanation:
The last Aztec emperor, who was tortured by the Spaniards, was Cuauhtémoc. Unlike Montezuma II, who was captured by Hernán Cortés and died in mysterious circumstances, Cuauhtémoc was taken captive after the fall of Tenochtitlan.
He later faced torture at the hands of the Spaniards who were trying to find the Aztec treasures. It was under the leadership of Cuauhtémoc that the Aztecs made their last stand against the Spanish conquistadors, leading to the final collapse of the Aztec Empire.