This article offers a revision of the chronology and settlement history of Tula, Hidalgo, synthesizing information obtained from numerous investigations and 68 radiocarbon and seven archaeomagnetic dates. Tula Chico's earliest settlement appeared while the region was under the control of Teotihuacan as one of many hilltop Coyotlatelco settlements in the region. The monumental center at Tula Grande did not appear until after Tula grew to power, presumably with the consolidation of the other Coyotlatelco polities. Extensive exposure of residential structures in numerous localities have revealed a widespread pattern of barrios containing households exhibiting a wide range of social status that enjoyed access to a wide variety of luxury items including the first reported objects of gold. Tula Grande and the Tollan phase city appear to have already been abandoned and in ruins prior to the arrival of Aztec II peoples. The Late Aztec period occupation shows a preoccupation with Tula's ruins that parallels similar evidence from the Templo Mayor excavations suggesting it was indeed the place the Aztecs called Tollan.