It served as the site's center of gravity during the Late Classic period. Some of its buildings present the Pix'an architectural style, typical of Kohunlich (smooth walls of stone placed “a hueso” -that is, without mortar-, moldings that frame groups of small columns, rounded jambs in the main entrance, embedded columns and niches in the facades). It is a space of exclusive use for members of the elite that has structures such as La Gradería, associated with the celebration of various ceremonies.

El Rey (Structure B-2): It is located at the west end of the Plaza de las Estelas. Fragments of Late and Terminal Classic ceramics were found here, as well as carved and polished lithics. The distribution, constructive quality and style of this small construction are identical to those of the buildings of the West Residential Complex that were built between 600-800 within the modified Río Bec style.

The Graderia (Structure B-3): Located at the southern end of the Plaza of the Stelae, Structure B-3 is a group of at least five buildings, oriented on an east-west axis, built on a common platform, which was extended to the east and south to allow for the construction of new buildings, the last of which seems to have been built as part of the Plaza Mewin.

In this structure a burial-offering was located. It is a human leg associated with some animal bones and some bone fragments corresponding to an infant. The ceramics found in this context allow us to date the offering to the middle of the Late Classic (ca. 700).

Palace of the Stelae (Structure B-4): It closes the east side of the Plaza of the Stelae. It is a group of at least four buildings arranged on a common platform, extended on several occasions. The different constructive stages that can be registered in this group seem to testify a long occupational history, during which several constructive projects were developed. In the central room of the main building was located the burial of an adult that contained a complete vessel corresponding to the Terminal Classic (ca. 900).