During this time, the Maya were likely influenced by the Olmecs, a civilization to the west of them in the modern-day Mexican states of Veracruz and Tabasco. The Olmec people may have initially devised the long-count calendar that the Maya would become famous for, Coe wrote. However, the discovery of a ceremonial site dated to 1000 B.C. at Ceibal, an ancient Maya site, implies that the relationship between the Maya and Olmecs was more complicated than previously thought. The ceremonial compound dates back 200 years before similar structures that were built by the Olmecs, suggesting that they did not inspire the Maya.