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The ''Grolier Codex'' (sometimes referred to as the ''Sáenz Codex'')〔 is a Maya book of a pre-Columbian type but of disputed authenticity. It first appeared in a private collection in the 20th century and was displayed at the Grolier Club in New York, hence its name.〔Gent 1971.〕 The codex consists of a fragment of a Maya book, containing almanacs of Venus represented in a simplistic fashion.〔Sharer and Traxler 2006, p. 129.〕 The ''Grolier Codex'' would be only the fourth surviving pre-Columbian Maya book if genuine.〔Vail 2006, p.498.〕 The codex is said to have been recovered from a cave in the Mexican state of Chiapas in the 1960s, together with a mosaic mask and some blank pages of pre-Columbian fig-bark paper.〔Vail 2006, p. 498. Coe 1973a, p. 1502.〕 It was displayed at the Grolier Club from April 20 to June 5, 1971,〔Coe 1973a, p. 5.〕 and is now held in Mexico City.〔 In 1973, Michael D. Coe published the first half-size recto-side facsimile of the codex in ''The Maya Scribe and His World'', produced by the Grolier Club.〔Coe 1973a, pp. 152-153.〕 The codex contains a Venus almanac that, in structure, is closely related to the Venus almanac contained in the ''Dresden Codex''.〔Vail 2006, p. 501.〕 The codex, although displaying Mixtec stylistic features, is judged to be Maya (if genuine) based upon the use of bark paper instead of the deerhide preferred for Mixtec codices and because of the presence of Maya day signs and numbering.〔Milbrath 2002, pp. 52, 57.〕 The codex is poorly preserved; the surviving page fragments display a number of figures in central Mexican style, combined with Maya numbering and day glyphs. The document is currently held by the Museo Nacional de Antropología in Mexico city and is not on public display. The physics institute of the Universidad Nacional Autónoma de México subjected the codex to non-destructive testing in an effort to determine its authenticity. The results were published in 2007 and were mixed; the document apparently contains genuine pre-Columbian materials but certain aspects, such as seemingly artificially induced wear and tear, are suspect. The researchers concluded that they were unable to prove or disprove the pre-Columbian nature of the codex. ==Physical characteristics== The ''Grolier Codex'' is a screenfold book fashioned from bark paper, coated with stucco on both sides and painted on one side. Eleven pages survive of a twenty-page book. The lower portions of the pages are badly damaged by moisture, eroding and staining bottom of each page. The eleventh page is particularly badly damaged with only the central portion remaining, making it unclear whether this page belongs to the codex or not. The greatest height of any of the surviving page fragments is and the average page width is .〔Coe 1973a, p. 150.〕 Five single sheets of bark paper were found associated with the codex, they had no stucco coating and were brown and water stained. Two of these had adhered to the codex and the other three may have once been with the codex but had separated. One of these sheets had a painted line in the same red hematite pigment used in the codex itself. A smaller sheet of bark paper was attached to the lined sheet and this smaller piece was submitted for radiocarbon dating. This testing produced a date for the sheet of AD 1230 ± 130.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Grolier Codex」の詳細全文を読む スポンサード リンク
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