Olmec colossal heads by Matthew Stirling in 1938 spurred the first archaeological investigations of Olmec culture. Seventeen confirmed examples are known from four sites within the Olmec heartland on the Gulf Coast of Mexico. Most colossal heads were sculpted from spherical boulders but two from San Lorenzo Tenochtitlán were re-carved from massive stone thrones. 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 from outside the Olmec heartland. Dating the monuments remains difficult because of the movement of many from their original contexts prior to archaeological
Mayan languages Raqan. However, it is probable that the word passed into European languages from a Cariban language or Taíno. The complex script used to write Mayan languages in pre-Columbian times and known today from engravings at several Maya archaeological sites has been deciphered almost completely. The script is a mix between a logographic and a syllabic system. In colonial times Mayan languages came to be written in a script derived from the Latin alphabet; orthographies were developed mostly by missionary grammarians. Not all modern Mayan languages have standardized orthographies, but the Mayan languages of Guatemala use a standardized, Latin-based phonemic spelling