Massive trophy skull rack discovered in the Aztec ruins

During excavations  at Mexico City’s Templo Mayor Aztec ruin site, archaeologists have discovered a massive tzompantli, or trophy skull rack of sacrificed human skulls.

It was built between 1485 and 1502.

'Racks known as “tzompantli” were where the Aztecs displayed the severed heads of sacrifice victims on wooden poles pushed through the sides of the skull. The poles were suspended horizontally on vertical posts,' The Guardian reports .

Sacrificed human skulls at Mexico City's Templo Mayor Aztec ruin site. Photo credits: Intituto Nacional Antropologia e Historia (INAH)

Eduardo Matos, an archaeologist at the National Institute of Anthropology and History, suggested the skull rack in Mexico City “was a show of might” by the Aztecs. Friends and even enemies were invited into the city, precisely to be cowed by the grisly display of heads in various stages of decomposition.

Paintings and written descriptions from the early colonial period showed descriptions of such racks. But institute archaeologists said the newest discovery was different.

Part of the platform where the heads were displayed was made of rows of skulls mortared together roughly in a circle, around a seemingly empty space in the middle. All the skulls were arranged to look inward toward the centre of the circle, but experts don’t know what was at the centre.

Archaeologist Raul Barrera said that “there are 35 skulls that we can see, but there are many more” in underlying layers. “As we continue to dig the number is going to rise a lot.”

Barrera noted that one Spanish writer soon after the conquest described mortared-together skulls but none had been found before.

University of Florida archaeologist Susan Gillespie, who was not involved in the project, wrote: “I do not personally know of other instances of literal skulls becoming architectural material to be mortared together to make a structure.”

The find was made between February and June on the western side of what was once the Templo Mayor complex.

The platform was partly excavated under the floor of a three-storey colonial era house. Because the house was historically valuable, archaeologists often worked in narrow excavation wells two metres (six feet) under the floor level suspended on their stomachs on a wooden platform.