Ortega explains that the building was built in 7 construction stages and that there were great rituals during each of them: sumptuous offerings which included human and animal sacrifices
The 12 pieces were found in Reggio Calabria y Ancona in Italy and turned over to the Mexican embassy in Italy on October 11.
The temple is over 650 years old and was discovered nearly 10 feet below street level.
El Día de Muertos has been celebrated continuously for 3,000 years and today is a fusion between pre-Hispanic and European traditions.
The discovery suggests the extent to which the Spanish re-used the temples of the Aztec capital in the first years after capturing it.
According to archaeologist Israel Elizalde Aztecs kept eagles in captivity to use them in the offerings and, in some cases, to use their skins, bones and feathers to manufacture garments or objects.
Hundreds of skulls would have been arranged neatly on the wooden poles of the racks, which served to inspire fear and awe.