Edit I'm seeing 6 figure conquistador estimates and a 3 figure number acquired so far? Do you have a cite for 50k? Seems like a likely enough number just curious if anything has been refined since this https://www.dailymail.co.uk/sciencetech/article-5893933/The-...
the six figure estimate provided by the conquistador was written off as fabricated or exaggerated, unti the skull towers were discovered by archaeologists, and a few years later were discovered to roughly match the dimensions provided by the conquistador. i gave half his number as a conservative hedge.
the aztecs are believed to sacrificed tens of thousands of people a year; i do not think it is as outlandish as it may sound.
the aztecs were a truly, historically, uniquely bloodthirsty people.
this was a traditional rite; the skin would then be placed in a clay vessel underneath a temple or shrine alongside many others