Piedras Negras

Piedras Negras (pyāˈħräs nāˈgräs) [key] [Span., = black stones], ruined city of the Classic era of the Maya, NW Petén, Guatemala, in the Usumacinta valley. Reaching a peak of sculptural achievement (according to one dating system, between 731 and 795), Piedras Negras developed some of the finest pre-Columbian stonework.

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