El Tajin From Humboldt's "New Spain" vol II "In the northern part of the intendancy of Vera Cruz, west from the mouth of the Rio Tecolutla, at two leagues distance from the great Indian village of Papantla, we met with a pyramidal edifice of great antiquity. The pyramid of Papantla remained unknown to the first conquerors. It is situated in the midst of a thick forest, called Tajin in the Totonac language. ? The Indians concealed this monument, the object of an ancient veneration for centuries from the Spaniards; and it was only discovered accidentally by some hunters about thirty years ago."
Mexico City Apr 12 1803 - Jan 20 1804; Whilst in Mexico city he lived at 80 Rep. de Uruguay in the historic center of the town (building can still be seen)