Tiahuanaco, Huari, and their Middle Horizon spheres of influence. The map shows the overlap of the two spheres, as well as each capital, important secondary sites, and key geographical areas (in bold text). Drawing by William H. Isbell.
Isbell, William H.; Uribe, Mauricio I.; Tiballi, Anne; Edward P. Zegarra, 2018, "Visual database", https://doi.org/10.25346/S6/1B33FN.