A Lowland Maya center located in south-central Petén, Guatemala. The site was occupied as early as 800 BC, expanded in size and importance in Preclassic period, and was at its height in the Late Classic, 770-900 AD, while rest of Maya civilization was declining. Archaeologists think that influx of non-Classic Maya (Putun) from the Gulf Coast prompted its development at that time. The site is dominated by three groups of ceremonial buildings, built around plazas and connected by causeways. Most of the population lived in small house clusters around these nuclei. Seibal was abandoned by 950, probably as part of the general decline of the Classic Petén centers.