The historiography and historical archaeology of Pecos, carried out by investigators from Adolph Bandelier to Genevieve Head, sought an understanding of the story of Pecos and the complex sequence of structural change in this nearly four-hundred-year-old group of buildings. Ultimately, a century after Bandelier first speculated on the age and plan of the church, convento, and other Spanish buildings at Pecos, we have finally begun to achieve this understanding. This report will summarize those years of work, and the conclusions to be reached from them.