Cerro de la Malinche

The Cerro de la Malinche, a hill on the other side of the Río Tula to the west of the town of Tula de Allende, is where, chiselled into the smooth rock-face, the calendar motive of "1 reed 8 flint" (ad 980) was found. This suggests the period of Ce Acatl Topiltzín's regency, although it was probably added later by the Aztecs.