Since the Spanish conquest, the Mayas have clung to the semi-barren, open plains of the peninsula, and have more than once revolted.
The Mayas have left no r cord of their institutions or of the causes of their decline, beyond what may be deduced from their ruined structures.
Other remains which bear witness to tlae civilization of, the Mayas are the paved highways and the artificial reservoirs (aguadas) designed for the preservation of water for towns through the long dry season.
The Nahuatl lapidaries had at hand many varieties of workable and beautiful stone - onyx, marble, limestone, quartz and quartz crystal, granite, syenite, basalt, trachyte, rhyolite, diorite and obsidian, the best of material prepared for them by nature; while the Mayas had only limestone, and hard, tenacious rock with which to work it, and timber for burning lime.
The Mayas had a calendar of 360 days, with intercalary days; this solar year was intersected by their sacred year of twenty weeks of thirteen days each, and these assembled in bewildering cycles.