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At Edzna there are two large group of structures: The "Gran Acropolis" (with a five-story pyramid, over 38 m.) and the "Pequeña Acropolis". Between 1958 and 1962, Edzna had been partially restored by Raul Pavón Abreu. Ray T. Matheny, between 1971-1974, recognized the monumental hydraulic system that had been built to serve Edzna, over 20 km. of canals and reservoirs. Matheny said. ''"the orientation of the converging canals has some long-forgotten symbolic meaning that may be linked with celestial observation or some cosmological concept".''  

At Edzna there are two large group of structures: The "Gran Acropolis" (with a five-story pyramid, over 38 m.) and the "Pequeña Acropolis". Between 1958 and 1962, Edzna had been partially restored by Raul Pavón Abreu. Ray T. Matheny, between 1971-1974, recognized the monumental hydraulic system that had been built to serve Edzna, over 20 km. of canals and reservoirs. Matheny said. ''"the orientation of the converging canals has some long-forgotten symbolic meaning that may be linked with celestial observation or some cosmological concept".''  

== Edzná as earliest Mayan Astronomical Center ==

== Edzná as earliest Mayan Astronomical Center ==

 

''On the two days of the year when the [[sun]] is vertically overhead at noon, the stone disk ensures that the entireshaft is in shadow; on all other days, a stripe of sunlight will fall across the shaft. As a result, there can be little doubt that the priests of Edzná had an accurate gauge on the timing of the sun's zenithal passage.'' VINCENT H. MALMSTRÖM from Dartmouth College.

''On the two days of the year when the [[sun]] is vertically overhead at noon, the stone disk ensures that the entireshaft is in shadow; on all other days, a stripe of sunlight will fall across the shaft. As a result, there can be little doubt that the priests of Edzná had an accurate gauge on the timing of the sun's zenithal passage.'' VINCENT H. MALMSTRÖM from Dartmouth College.