Sapa Inca
Colonial sources are not entirely clear or in agreement about Inca government structure, such as exact duties and functions of government positions. But the basic structure can be broadly described. The top was the "Sapa Inca". Below that may have been the "Willaq Umu", literally the "priest who recounts", the High Priest of the Sun. However, beneath the "Sapa Inca" also sat the "Inkap rantin", who was a confidant and assistant to the "Sapa Inca", perhaps similar to a Prime Minister. Starting with Topa Inca Yupanqui, a "Council of the Realm" was composed of 16 nobles: 2 from "hanan" Cusco; 2 from "hurin" Cusco; 4 from Chinchaysuyu; 2 from Cuntisuyu; 4 from Collasuyu; and 2 from Antisuyu. This weighting of representation balanced the "hanan" and "hurin" divisions of the empire, both within Cusco and within the Quarters ("hanan suyukuna" and "hurin suyukuna").