During the archeological investigation work, a hole was explored in building 15, which stands at the end of the first ballcourt. No one imagined that this would allow us to discover a major sequence of activity at the site. It is enough to stand in the center of the court to see that this pyramidal base does not cover the whole width of the space. In fact, the first section is aligned, but the plinth is not. This is because this building was reworked on six occasions, as described in the following paragraphs.

At some point, instead of the ballcourt, there was a courtyard here. To the north, at the end of the court, there was a room which was later demolished, while to the south, on the platform, a circular building of around 10 meters in diameter was found, which can be seen beside the staircase behind the raised sloping wall on the west side of the building (see photo 1).

Years later (we don’t know exactly how many), this space was altered. The shape of the temple was radically altered, giving way to the second major construction phase. The staircase was removed from the building to cover it with a rectangular plinth. The front of the building was kept in the same place, while a double staircase and a niche was built in the center, as can be observed on the circular structure (see photo 2).

With the passage of time, the building was again remodeled. Not only was a wall built to completely surround it, but the height of the plinth was also increased (see photo 3). And at a later stage, the latter was raised even higher (see photo 4).

The building underwent a further significant transformation with the incorporation of two plinths. The lower section, which is taller in height, is formed by an slope of around two meters and an overhanging ledge. A smaller volume was placed above, just one meter in height, on which a rectangular room was built which topped the building. In the four corners an adornment wall was added of approximately one meter and then an overhanging ledge was incorporated (see photos 5 and 6).

The final addition to this construction was in the back section, where the base of a small room which functioned as an annex to the upper temple can also be seen (see photo 7).

This detailed inspection of building 15 allows us to observe the succession of building styles in Toluquilla. Although it is impossible to determine the date of each phase of construction, the pottery fragments found suggest that the last one dates from 1200 AD.