Note: Most recently, was a 19th-century lumber camp. Historically was an important Mayan settlement on a hill overlooking the Río de la Pasión; by 900 CE, the city was all but abandoned. Excavations and surveys were conducted in the 1960s by the Peabody Museum of Harvard University. The settlement is best known for its Late Classic (ca. 600-900 CE) occupation. The 9th-century invasion of non-Classic Maya peoples, left its mark on the sculpture, ceramics, and architecture of Seibal. Of particular interest are the 22 well-preserved stele (most erected after 800 CE) that have been found. Contains hieroglyphic inscriptions.