Funerary mask of the Mayans on display at Mexico City's National Museum of Anthropology

The Calakmul Mask is a funerary piece elaborated in jade mosaic, shell and gray obsidian, whose antiquity goes back to 660 and 750 AD.
MEXICO---A series of temporary exhibits called “One piece, one culture” starts with the exhibition “The Calakmul Mask. Universe in Jade.” During its inauguration, Teresa Franco, director of the National Institute of Anthropology and History (INAH), added that through a single piece highly significant many elements of thought and the worldview of one of the greatest cultures could be explained: the Mayans. [link]