Achacachi was the capital of a colla "señorio" called Pacasa, in the "Umasuyus" (from Aymara: "shore side") region, which was located alongside the East of Lake Intikjarka (Titicaca) in the Peru-Bolivian plateau.
Achacachi served as the capital city for the "Pacasa" domain, located within the "Umasuyus" region along the eastern shore of Lake Intikjarka in the Peruvian-Bolivian plateau.