Four steps lead to the platform of the fourth construction stage of the pyramid, with a double staircase leading to the upper part where the shrines were located.

Axayácatl was the sixth tlatoani or lord of Tenochtitlan (1469-1481). At the beginning of his government, he ordered the construction of the second extension of the main façade of the Templo Mayor.

It is worth observing the magnificent sculptures of four serpent heads, next to the staircase. At the ends, there are two serpents with huge undulating bodies, which retain their original color.

In the northern half of the platform, dedicated to Tlaloc, the Altar of Frogs, animals associated with this deity, stands out. At the top there is a small shrine dedicated to the god. In the half dedicated to Huitzilopochtli, there is a slab decorated with carved snakes, embedded in the staircase. At the foot of it is a copy of the monolith of Coyolxauhqui.

Coyolxauhqui: Sculpture of the goddess Coyolxauhqui, it is located at the foot of the staircase of the Templo Mayor in the section dedicated to Huitzilopochtli.

Serpent head: Sculpture of serpent head, is located at the foot of the staircase, in the section of the Temple dedicated to Tlaloc.