Archaeologists believe that the sacrifice took place around 1450 in a cornerstone-laying ceremony to mark the building a new layer of the temple (new layers were added about once every 52 years). An Associated Press article remarked that:
"Priests propped the child in a sitting position, his legs splayed out in front of him, and workers packed sand and clay around his body, which was then covered beneath a flight of stone temple steps...the find came almost by accident last month, as archaeologists dug a test trench at the edge of a temple on the crossroads of two major thoroughfares in the ancient city of Tenochtitlan, the name the Aztecs gave to the city they founded in 1325. About a yard below the surface, they saw the top of a tiny skull." 
Reynolds, A. C., Betancourt, J. L., Quade, J., Patchett, P. J., Dean, J. S., and Stein, J. (2005). "87Sr/86Sr sourcing of ponderosa pine used in Anasazi Great House construction at Chaco Canyon, New Mexico." Journal of Archaeological Science 32, 1061-1075.
On 18 April, the bodies of 30 British Royal Navy officers and sailors discovered in 2000 on Nelson's Island are buried in a naval ceremony in Alexandria, Egypt. Dating from the 1798 Battle of the Nile and another battle three years later, only one body, that of Commander James Russell, can be positively identified.