Provided by Kevin L. Callahan, an anthropology graduate student at the University of Minnesota, this site consists of short, referenced essays, organized by civilization (Maya, Mixtec, Zapotec, and Aztec), on Mesoamerican writing systems, governments, and religions. Users can also read essays on the Mayan calendar, "How the Sky Works," and on Maya and Zapotec political structures. These essays, along with a selective, eclectic list of Mesoamerican Internet resources, and a brief bibliography, form a good introduction to the topic of ancient Mesoamerican civilizations.