 The ceremonial centre of the city consisted of 43 structures clustered in an area of 1 @,@ 400 square metres ( 15 @,@ 000 sq ft ) . The architecture at the site includes talud @-@ tablero style buildings with double stairways . The facades of some of the buildings have cylindrical columns , a feature found in other parts of Mesoamerica . Artefacts recovered from the site include items fashioned from turquoise and precious metals . The metal artefacts crafted from gold , silver and copper and their alloys demonstrate the city 's participation in the wider trade networks of the Postclassic Period . These metal artefacts were either influenced by or imported from Mexico and southern Central America . 
