Who was the incan leader in 1438 to 1533?

The Incan leader from 1438 to 1533 was Pachacuti, who is often credited with transforming the small kingdom of Cusco into a vast empire known as Tawantinsuyu. He implemented significant administrative and military reforms, expanded the empire's territory through conquests, and initiated major construction projects, including the famous Machu Picchu. Pachacuti's reign marked the height of Incan power and influence in South America. His legacy continued through his descendants, notably his son, Topa Inca Yupanqui.