 The structures at Zaculeu were grouped around small plazas and were generally built from masonry , coated with a thick layer of plaster . Fragments bear floral and geometric designs , indicating the structures were originally brightly painted . Stones were undressed and cemented in adobe mortar . No evidence of corbel vaulting has been found and very little in the way of stone sculpture . The architecture completely lacks stone sculpture . Burials from the Early Classic yielded a rich array of finds , but Late Classic burials were accompanied by a lesser variety of grave offerings . 
