'Nailed-head ritual' in Iron Age Spain was more 'complex than initially thought,' severed skulls reveal | Live Science

An analysis of the origins of seven severed skulls with nails through them shows that some people treated this way in Iron Age Spain were local while others came from afar.

https://www.livescience.com/archaeology/nailed-head-ritual-in-iron-age-spain-was-more-complex-than-initially-thought-severed-skulls-reveal