Olmec colossal heads the monuments with ropes. Two heads from San Lorenzo have traces of niches that are characteristic of monumental Olmec thrones and so were definitely reworked from earlier monuments. Seventeen confirmed examples are known. An additional monument, at Takalik Abaj in Guatemala, is a throne that may have been carved from a colossal head. This is the only known example outside of the Olmec heartland on the Gulf Coast of Mexico. Possible fragments of additional colossal heads have been recovered at San Lorenzo and at San Fernando in Tabasco. Crude colossal stone heads are also known in the Southern Maya area
Indigenous peoples of the Americas 15th–early 16th centuries), and are known only through oral history and through archaeological investigations. Others were contemporary with the contact and colonization period, and were documented in historical accounts of the time. A few, such as the Mayan, Olmec, Mixtec, and Nahua peoples, had their own written languages and records. However, the European colonists of the time worked to eliminate non-Christian beliefs, and burned many pre-Columbian written records. Only a few documents remained hidden and survived, leaving contemporary historians with glimpses of ancient culture and knowledge. According to both indigenous American and European accounts and documents, American civilizations before and