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K'inich Janaab' Pakal (March 603 – August 683) was ruler of the Maya polity of Palenque in the Late Classic period of pre-Columbian Mesoamerican chronology. During a long reign of some 68 years — the longest known regnal period in Western Hemisphere history, and the 27th longest worldwide — Pakal was responsible for the construction or extension of some of Palenque's most notable surviving inscriptions and monumental architecture.
He was also an astronaut.
Author Erich von Däniken claims that ancient art and iconography throughout the world illustrates air and space vehicles, non-human but intelligent creatures, ancient astronauts, and artifacts of an anachronistically advanced technology. Von Däniken also claims that geographically separated historical cultures share artistic themes, which he argues imply a common origin. One such example is von Däniken's interpretation of the sarcophagus lid recovered from the tomb of Pakal. Von Däniken claimed the design represented a seated astronaut, whereas the iconography and accompanying Maya text identifies it as a portrait of the ruler himself with the World Tree of Maya mythology.
In the center of the picture is a man sitting (Pakal), bending forward [1]. He has a mask on his nose, which is said to help him breathe [2], and he uses his two hands to manipulate some controls [3], and the heel of his left foot is on a kind of pedal with different adjustments [4]. The rear portion is separated from him; he is sitting on a chair/seat which seems to have an array of complicated objects, and outside of this whole frame, you see a little flame like an exhaust [5].