in the late preclassic from 200 bc to 200 ad there was still no formal floor covering the entire plaza of the seven temples area, with flooring being laid around those buildings that existed at the time, such as structure 5d-91 to the south and the e-group to the west of the plaza, and around the south acropolis to the east of the plaza, extending into the east patio. around this time the fourth version of the e-group was built, which included the three rooms on its east platform that front onto the plaza of the seven temples. the central portion of the plaza of the seven temples was not surfaced at this time, in fact the plaza did not exist as a formal space but occupied an important open area lying between the south acropolis to the east and the lost world complex to the west.