Classic Lowland Maya site located on steep terraces on the Usumacinta River, Guatemala. There were ballcourts, temple pyramids, courtyards, and ceremonial sweatbaths (temescales). It is best known for the finely carved stone monuments in the form of hieroglyphic inscriptions on lintels, stelae, and wall panels. These art works were the main source in Tatiana Proskouriakoff's study which showed that certain hieroglyphs recorded historical rather than ceremonial events. Military themes occur frequently in the art; the seashells are from both the Pacific and Gulf coasts, and obsidian and jade attest to widespread trading. The terminal Long Count date for the site is 795 AD.