These materials provided the basis of a growing professionalized archaeoastronomy, blossoming in the 1970s and expanding into recent years. The chapters here exemplify the advances made in the field during the early 21st century as well as the on-going diversity of approaches, presenting new perspectives and discoveries in ancient Mayan astronomy that result from recent studies of architectural alignments, codices, epigraphy, iconography, ethnography, and calendrics. More than just investigations of esoteric ancient sciences, studies of ancient Mayan astronomy have profoundly aided our understanding of Mayan worldviews. Concepts of time and space, meanings encoded in religious art, intentions underlying architectural alignments, and even methods of political legitimization are all illuminated through the study of Mayan astronomy.