The earliest traditions of stone sculpture in Costa Rica, including ceremonial metate, began in late Period IV (A.D. 1–500). Metate from the Nicoya/Guanacaste region have longitudinally curved and rimless plates. Those from the Atlantic Watershed have a plate that is horizontally flat and rimmed. Both are associated with mortuary goods, suggesting differential social status existed within these communities. The three main types of Costa Rican stone sculpture at this time—tripod-metate, mace heads and jade “axe-god” pendants—peaked and declined in use during Period V (A.D. 500–1000).