A recent discovery has been the oldest pre Hispanic tomb, dated to between 700 and 500 BCE. It was found in a previously excavated 20-meter-tall pyramid, but in the very center. The occupant is richly attired with more than twenty axes found as offerings, placed in the cardinal directions. The culture is considered to be Olmec although more exact dating needs to be done. The offerings show Olmec influence, such as depictions of wide eyes and lips, but other typical Olmec decorations such as earspools and breastplates are missing. In addition to the axes, there are also more than three thousand pieces made of jade, river pearls, obsidian and amber, from areas as far away as Guatemala and the Valley of Mexico, showing trade networks. The face was covered in a seashell with eye and mouth openings, the earliest example of a funeral mask. The burial shows that many elements of Mesoamerican burials are older than previously thought.