a Maya one. Some glyphs in this scripts are readable as they are identical to Maya glyphs but the script remains undeciphered. The advanced decay and destruction of these archaeological sites make it improbable that more monuments with these scripts will come to light making possible a decipherment. Maya writing Maya writing is attested from the mid-preclassic period in the center of Petén in the Maya lowlands, and lately scholars have suggested that the earliest Maya inscriptions may in fact be the oldest of Mesoamerica. The earliest inscriptions in an identifiably Maya script date back to 200–300 BCE. Early examples include the painted inscriptions at the caves of Naj Tunich and La Cobanerita in El Petén, Guatemala. The most elaborate inscriptions are considered to be those at classic sites like Palenque, Copán and Tikal. The Maya script is generally considered to be the most fully developed Mesoamerican writing system, mostly because of its extraordinary aesthetics and because it has been partially deciphered. In Maya writing, logograms and syllable signs are combined. Around 700 different glyphs have been documented, with some 75% having been deciphered. Around 7000 texts in Maya script have been documented. Maya writing first developed as only utilizing logograms, but later included the use of phonetic complements in order to differentiate between the semantic meanings of the logograms and for context that allows for syllabic spelling of words. Post-classic inscriptions are found at the Yucatán peninsula in sites such as Chichén Itza and Uxmal but the style is not nearly as accomplished as the classic Maya inscriptions. Other potential Mesoamerican writing systems Two other potential writing systems of the pre-classic period have been found in Mesoamerica: The Tlatilco cylinder seal was found during the time frame of the Olmec occupation of Tlatilco, and appears to contain a non-pictographic script. The Chiapa de Corzo cylinder seal found at that location in Mexico also appears to be an example of an unknown Mesoamerican script. Certain iconographic elements in Teotihuacano art have been considered as a potential script, although it is attested sparsely and in individual glyphs rather than texts. If it indeed is a writing system, it is "one whose usage is non-textual and only restricted to naming people and places". In this aspect, it resembles later Central Mexican writing systems such as Mixtec and Aztec. Post-Classic Period During the post-classic period, the Maya glyphic system continued to be used,