Diego de Landa Calderón, O.F.M. was a Spanish bishop of the Roman Catholic Archdiocese of Yucatán. Many historians criticize his campaign against idolatry. Many historians criticize his campaign against idolatry. In particular, he burned almost all the Maya manuscripts (codices) that would have been very useful in deciphering Maya script, knowledge of Maya religion and civilization, and the history of the American continent. Nonetheless, his work in documenting and researching the Maya was indispensable in achieving the current understanding of their culture.