 Under the palace was the Great House, a area stone house divided into five rooms with meter-thick walls suggesting a second story was present.The presence of the house, which is unlikely to have been a private residence like the others, suggests a communal or public use; i.e., it may have been the predecessor of a palace.In the Late or Final Neolithic (two different but overlapping classification systems, around 4,000–3,000 BC), the population increased dramatically.