
thumb|250px|Ushnu in Vilcashuamán, Ayacucho, Peru. In the Inca Empire the ushnu (other spelling usnu, sometimes usñu) was an altar for cults to the deities, a throne for the Sapa Inca (emperor), an elevated place for judgment and a reviewing stand of military command. In several cases the ushnu may have been used as a solar observatory. Ushnus mark the center of plazas (main squares) of the Inca administrative centers all along the highland path of the Inca road system.
thumb|250px|Ushnu in Vilcashuamán, Ayacucho, Peru. In the Inca Empire the ushnu (other spelling usnu, sometimes usñu) was an altar for cults to the deities, a throne for the Sapa Inca (emperor), an elevated place for judgment and a reviewing stand of military command. In several cases the ushnu may have been used as a solar observatory. Ushnus mark the center of plazas (main squares) of the Inca administrative centers all along the highland path of the Inca road system.
The ushnu had also the function of a basin with a drain for libations. During the most important Inca festivals such as the Situa in Cusco, the capital of the Inca empire, the emperor poured chicha (fermented maize beverage) into the top basin as an offer to his father the Sun god and those who attended the ceremonies could drink it at a lower outlet. Sacrifices were also held in proximity of or at the ushnu. While in the capital the ushnu was the axis of the Inca ceremonies, in the provinces of the empire they represented the central power and had a public role and were generally quite large structures, bigger than the ushnu in Cusco.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).