Aztec sun stone

... On the occasion of the new paving, the floor of the Plaza being lowered, on December 17 of the same year, 1790, it was discovered only half a yard deep, and at a distance of 80 to the West from the same second door of the Royal Palace, and 37 north of the Portal of Flowers, the second Stone, by the back surface of it.

In 1964 the stone was transferred to the National Museum of Anthropology and History, where the stone presides over the Mexica Hall of the museum and is inscribed in various Mexican coins.

Before the discovery of the monolith of Tlaltecuhtli, deity of the earth, with measurements being 4 by 3.57 meters high, it was thought that the sun stone was the largest Mexica monolith in dimensions.

The duration of the ages is expressed in years, although they must be observed through the prism of Aztec time. In fact the common thread of figures 676, 364 and 312 is that they are multiples of 52, and 52 years is the duration of one Aztec "century", and that is how they can express a certain amount of Aztec centuries. Thus, 676 years are 13 Aztec centuries; 364 years are 7, and 312 years are 6 Aztec centuries.

In addition to its tremendous aesthetic value, the Sun Stone abounds in symbolism and elements that continue to inspire researchers to search deeper for the meaning of this singular monument.

The sun stone image is displayed on the obverse the Mexican 20 Peso gold coin, which has a gold content of 15 grams (0.4823 troy ounces) and was minted from 1917 to 1921 and restruck with the date 1959 from the mid-1940s to the late 1970s. Different parts of the sun stone are represented on the current Mexican coins, each denomination has a different section.

Currently the image is present in the 10 Peso coin as part of the New Peso coin family started in 1992 having .925 silver centers and aluminum bronze rings changing in 1996 where new coins were introduced with base metal replacing the silver center.