The Pyramid of the Moon was deliberately placed at the end of the Avenue of the Dead and at the foot of Cerro Gordo. This central position makes the processional nature of the Walk of the Dead rather clear. This mimicking of natural structures in human temples has been seen throughout Mesoamerican culture. The relation between the mountain, pyramid, and road has been theorized to resemble a connection between the road and the watery underworld, whereas the mountain serves as a sort of anchor to the earth. Also significant in the larger plan of the city is the orientation of all of the buildings. The north–south axis of the city emphasizes the cosmological and astrological ideologies of the city, since there was a connection between this orientation and the ritual 260-day calendar. The east–west was the worldly structure of the city used for the sake of symmetry. Connecting the Pyramid to the Avenue of the Dead is a public plaza, located at the base of the pyramid. This plaza was viewed as the ritual/sacred site, while the pyramid was seen as a structure built on top of it. Building layers This pyramid has 7 different layers of buildings which were constructed on top of each other in order to update the building's religious power over time. Building 1 is the oldest monument in Teotihuacan, from approximately 100 CE. The structure was a square pyramidal platform with talud side facades that were about 23.5 meters long. Building 2 was a minor enlargement that covered the entire previous structure, while correcting its orientation, which was slightly unaligned from the true east–west axis of the Pyramid of the Moon Complex. Building 2 was also in talud style whose east–west walls were about 29.3 meters long. Building 3 covered the construction before it, but didn't expand much. Building 4: was a substantial enlargement which rendered the building's east–west width is 89.2 meters and its north–south length is 88.9 meters. This building was completed in approximately 250 CE. Building 5 was somewhat expanded, the architectural style of the building was the main shift. The east–west size didn't change, but the north–south wall grew to 104 meters. The style used was talud-tablero on both the main body and an additional adosada platform. This design still used the pyramid as a stage for ritual, rather than a house for a temple. Building 6 grew to be east–west