This is a print on demand publication. Why do people orient buildings the way they do? That the depiction of the cardinal directions of space had something to do with events taking place in the sky is suggested by cosmological diagrams derived from the civilizations of ancient Mexico. Contents: The Orientation Problem & Categories of Explan., The Orientation of Ceremonial Architecture in Ancient Mesoamerica, Alignment of Maya Sites, Puuc Building Alignments, Discussion of Individual Site Plans: Uxmal, Sayil, Kabah, Labna & Outliers, Oxkintok & Outliers, Chacmultun, Kiuic, & Xcalumkin, Xculoc, & the Puuc Sites in Campeche, The Question of Site Chronology, Calendrical Implications of Astronomical Orientation Hypotheses, & The Orientation Calendar in a Cultural Context. Tables. Illus.