As for me, after I climbed ladder up the ridge to the observation area, I thought it was the greatest warning system in the world for sighting any invading army below on the extensive plains below. Thus, the Dia de los Matados should have been when the mountain observatory post was conquered by "Water Dog" or Ahuitzotl.
It was almost impregnable, anyone has a picture of the Wall of Atetelco in Teotihuacan you can see the History "Blurb cartoon" with Ahuitzotli's portrait on the wall below the Spider Lady of the Owl Mask.
If one has ever climbed that ridge you would also understand why it was called the Dia de los Matados. . . . not suicides or non-Christian burials, but a real battle and a real defeat of warriors attempting to defend their lands by warning their own of danger from the ridge observation post.
