Teotihuacán is a ruins in the Mexican state México.
It lies nearby the city of the same name with about 45,000 inhabitants.
It once was the greatest city of the american continent. It lies about 40km northeast of Mexico City.
The Aztecs, giving the city its current name, knew what they had built.
They called the location Teotihuacan, "City of the Gods".

View from the sun pyramid on the moon pyramid.

The wide main street of the complex is more than one kilometer long
and was called Avenida de los Muertos (Alley of the Dead), because the Aztecs
used the city as a gravesite. It led from the temple of Quetzalcóatl to the moon pyramid,
where the huge sun pyramid also lies. It is flanked by the ruins in an impressive singular design.

The sun pyramid, with its huge dimensions of 220 x 225m,
and a height of 63, nearly achieve the format of an egyptian pyramid.
The moon pyramid is slightly smaller, but is pleasingly proportioned.
Who was responsible for the building of the greatest pre-columbian city
is still not known till today. One once thought that the Aztecs built this city,
but as this culture discovered the city, it was lying in ruins since long
and it was overgrown by the primeval forest again.

...underground rooms exist under a building, whose accesses
and covered and protected with thick layers of mica.
Mica has the property to withstand high temperatures and
is partially used today as a glass replacement in furnaces.
What reason did this material serve?

A pyramid was built over the temple of Quetzalcóatl and
parts of it are placed freely. It includes the fascinating reliefs of snake motifs.

Quetzalcoatl (Kukulkan, Gukumatz) is an Aztec god,
mostly displayed as a feathered snake.

The legend reports that the fourth epoch resulted with a bad ending.
A catastrophic flood followed a long time of darkness, whereby sunlight disappeared from the sky.
Then the following happened: The gods met in Teotihuacan, the city of the gods, and asked
who will be the next sun. Only the holy fire was still visible in the darkness, flickering alone in the
young chaos. „One should commit the sacrifice to fall in the fire“, they said, „Only then will there be a new sun“. Further into the meeting two gods sacrificed themselves, Nanahuatzin und Tecciztecatl. The gods waited long, until the morning dawn turned red and started to glow. The fifth sun appeared to the east.
In this moment of comic rebirth, Quetzalcoatl manifested himself.
His mission gave the fifth sun to mankind, therefore he took the form of a bearded,
white man just like Viracocha in the Andes.