The excavated site consists of two parts: 1) the temple itself, exposed and labeled to show its various stages of development, along with some other associated buildings, and 2) the museum, built to house the smaller and more fragile objects.
First Temple The first temple is only known through historical records because the high water table of
the old lakebed prevents excavation.
Second Temple The second temple was built during the reigns of
Acamapichtli,
Huitzilihuitl and
Chimalpopoca between 1375 and 1427. The upper part of this temple has been excavated, exposing two stone shrines covered in stucco on the north side. A
chacmool was uncovered as well. On the south side, there is a sacrificial stone called a and a sculpted face.
Third Temple The third temple was built between 1427 and 1440 during the reign of
Itzcoatl. A staircase with eight stone standard-bearers is from this stage bearing the
glyph with the year Four-Reed (1431). These standard bearers act as "divine warriors" guarding the access to the upper shrines.
Fourth Temple The fourth temple was constructed between 1440 and 1481 during the reigns of
Moctezuma I and
Axayacatl. This stage is considered to have the richest of the architectural decorations as well as sculptures. Most findings from the excavations date from this period. The great platform was decorated with serpents and
braziers, some of which are in the form of monkeys and some in the form of Tlaloc. During this time, the stairway to the shrine of Tlaloc was defined by a pair of undulating serpents and the middle of this shrine was a small altar featuring a pair of sculpted frogs. The circular monolith of Coyolxauhqui also dates from this time.
Fifth Temple The fifth temple (1481–1486) is dated to the short reign of
Tizoc. During these five years, the platform was recovered in stucco and the ceremonial plaza was paved.
Sixth Temple The sixth temple was built during the reign of
Ahuizotl. He finished some of the updates made by Tizoc and added his own, as shown on the carvings of the "commemoration stone of the ", depicting the two tlatoqueh celebrating the opening of the temple during the last day of the month Panquetzaliztli dedicated to Huitzilopochtli, day 7 of the year 8 (19 December 1487). The Sacred Precinct was walled off, and this wall was decorated with serpent heads. He built three shrines and the House of the Eagle Warriors. ==Seventh Temple==