From 1973 through 1979, the University Museum sponsored investigations at QuiriguA, a major lowland Maya site in eastern Guatemala, in order to document the basic chronology, determine the nature and pattern of structures, and test hypotheses concerning the origins, location, and demise of the city. This monograph reports the findings of the survey and excavations carried out in the lower Motagua Valley. Providing a regional context for QuiriguA, this volume focuses on wider-valley centers with monumental architecture, examining their chronology, function, and regional and interregional contacts.