 Under the administration of mayor Daniel Estrada Pérez, a staunch supporter of the "Academia Mayor de la Lengua Quechua", between 1983 and 1995 the Quechua name "Qosqo" was officially adopted for the city.Cusco extends throughout the Huatanay (or Watanay) river valley.Located on the eastern end of the Knot of Cusco, its elevation is around .