Sayil and Uxmal were declared "Cultural Heritage" by UNESCO in 1996. It had its brief heyday during the Terminal Classic period. A group of buildings and archaeological researches that have been developed at the site suggest that Sayil was ruled by a local lineage that based its power and wealth in agriculture.
Traces of pottery recovered in the Palace of Sayil indicate trade with the region of Petén. Obsidian artifacts found at the site, show the dominance of trade routes to the south of the Puuc region when Sayil was being built.