Fundamental cultural patterns—maize agriculture, precisely aligned site plans, the construction of pyramids and plazas, and images defining the ruler as the central figure connecting the natural and supernatural realms—spread across the region. Gulf Coast and central Mexican sites carry the Olmec tradition. By 400 B.C., the artistic and cultural dominance of the Gulf Coast wanes. In Oaxaca, the earliest known calendrical glyph occurs around 600 B.C. at the Zapotec site of San José Mogote. The influential site of Teotihuacan in central Mexico is established ca. 150 B.C.