The Triangle is a geometrical figure with explicit and hidden meanings. Is a figure composed of 3 boundary lines perfectly equal and comprises 3 angles, normally equal. It forms also the relevant traces of the All-Seeing Eye and may be appreciated in the pyramids of Egypt and in the Temples of Sun or Moon close to Mexico City. It is a common reference to masonic works or Freemasons in general. We may see it at the top of the most prestigious or famous building of human endeavour such as the Parthenon (Greece), the building of the American Congress, or the Arc of Triumph (France). It is the basic figure in the composition of Solomon Seal (above).