Here a source for the skull towers https://www.sciencemag.org/news/2018/06/feeding-gods-hundreds-skulls-reveal-massive-scale-human-sacrifice-aztec-capital https

Here a source for the skull towers https://www.sciencemag.org/news/2018/06/feeding-gods-hundreds-skulls-reveal-massive-scale-human-sacrifice-aztec-capital https://www.sciencemag.org/news/2018/06/feeding-gods-hundred...