Mesoamerica Civlization By bharis Period: 3500 BCE to 1500 BCE Archaic Stage 1200 BCE Earliest known Mesoamerican hieroglyphics 1200 BCE Influenced 26 different cities Period: 1200 BCE to 400 BCE Olmec Empire 600 BCE 10 Pound Rubber Ball invented The ball was invented for traditional/ceremonial games. 400 BCE Decline of the Olmec Empire The Olmec Empire started to decline most likely due to environmental changes Period: 250 to 900 Classical Stage Period: 1000 to 1521 Post Classical Stage Period: 1521 to 1821 Colonial Stage 1940 Large helmet heads La venta