 Throughout this region, many hundreds of Maya sites have been documented in at least some form by archaeological surveys and investigations, while the numbers of smaller/uninvestigated (or unknown) sites are so numerous (one study has documented over 4,400 Maya sites) that no complete archaeological list has yet been made.The listing which appears here is necessarily incomplete, however it contains notable sites drawn from several large and ongoing surveys, such as the "Corpus of Maya Hieroglyphic Inscriptions" (CMHI) and other sources (see References).Maya sites which are known to have been among the largest and most influential polities through the various eras of Maya history —Formative (or Preclassic), Classic and Postclassic— and/or which have left the most impressive archaeological remains include