 The K 'iche ' Kingdom of Q 'umarkaj conquered Zaculeu in the Postclassic . Traditionally that has been calculated as during the 15th century AD based on ethnohistoric accounts . Radiocarbon dating has pushed back the calculations of the K 'iche ' conquests by three centuries , and researchers now say their conquest of the Mam kingdoms may have taken place as early as the 12th century . The city was dominated by the K 'iche ' until the Spanish Conquest of the early 16th century . 
