The Phaistos Disc

The disc is fired clay, slightly irregular in outline, about 16 cm across and about 1 to 2 cm thick. Each face carries a spiral of stamped signs read, by most scholars, from the rim toward the centre, following the way the sign groups are packed and the direction the figures face⁠[3]⁠[4]. Side A has 31 groups and side B 30, together 61; the impressions number 241 or 242 depending on whether an erased and restamped sign is counted⁠[1]⁠[2]. The 45 distinct signs were cut once each into hard punches and pressed repeatedly, which makes the disc the earliest known use of movable type; several impressions show the maker correcting a sign by smoothing the clay and restamping⁠[4]. Some groups end with an oblique stroke under the last sign, which has been read as a suffix marker, a punctuation mark or a word-class indicator; no account of it is agreed⁠[3]. The sign set was encoded in Unicode in 2008 as the Phaistos Disc block⁠[10].

The find context is better documented than is often said. Giorgia Baldacci's 2021 review summarises Pernier's notes and Pietro Militello's re-examination of the deposit in 2013 and 2015: the disc lay in a destruction level of room 101, disturbed later, with pottery of the start of Middle Minoan IIIA, so around 1750 BC, with the last Protopalatial phase not excluded⁠[2]. The only close parallels for the signs are the Arkalochori axe, a bronze votive axe from a cave in central Crete bearing a short inscription in similar pictorial signs, and a small number of relief potmarks and a sealing from Phaistos⁠[3]⁠[2].

Decipherments. Duhoux's 2000 review set out the checks a reading must pass: it must use an accurate text, read in the right direction, choose a plausible script type, and not inflate the sign count to make room for a syllabary the disc does not show. Faucounau's proto-Ionian Greek reading failed these, with an estimated 88 to 95 signs against about 60, a misstated find context and internal inconsistencies⁠[3]. The Luwian reading of Achterberg and colleagues (2004), which makes the disc a letter to a king Nestor, depends on reading the signs as Luwian hieroglyphs of a much later period and has not been taken up by Anatolian specialists⁠[5]. Gareth Owens and John Coleman's reading, announced in 2014 and restated in 2018 as covering 99 per cent of the text, assigns Linear A and Linear B values to look-alike signs and reads the result as a hymn to a mother goddess; it rests on the assumption that the look-alikes share values and has not been published in a form others have confirmed⁠[1].

Authenticity. Eisenberg argued in Minerva in 2008 that the disc is a forgery planted by Pernier, perhaps with the restorer Émile Gilliéron, pointing to its uniqueness, its stamped rather than incised signs, and signs he saw as borrowed from Egyptian, Hittite and Lycian art of other periods; he and others called for a thermoluminescence test, which the Greek authorities have not allowed⁠[7]⁠[11]. Hnila's 2009 reply examined Pernier's record, the find circumstances and the signs, and found the evidence favoured authenticity, chiefly because sign 21 recurs on a sealing from Phaistos found in a secure context in 1955⁠[8]. La Rosa, from Pernier's excavation daybooks, argued that the timing and the people involved exclude a plant⁠[9]. Baldacci added that six disc signs have parallels in impressed fine ware from Phaistos excavated between 1950 and 1966⁠[2]. No physical dating of the clay has been done.

On the language, four positions are live: Minoan, the same language as Linear A, supported by the sign statistics and the context⁠[6]⁠[3]; Luwian or another Anatolian language, carried to Crete or written there, supported only by sign-shape comparisons⁠[5]; Greek, in various early forms, supported by selected readings and weighed against by the context⁠[3]; and something else or unknowable from one text. On the object, two: genuine, a Middle Minoan document with no surviving relatives except the Arkalochori axe and a few potmarks⁠[8]⁠[2]; or a modern forgery, which now requires that a forger in 1908 anticipated signs excavated at Phaistos between 1950 and 1966⁠[7]⁠[2]. The hoax hypothesis has lost ground but has not been closed by a physical test.

A thermoluminescence date on the fired clay would settle authenticity either way; the museum has declined to allow sampling⁠[11]. A second text in the same script, from a controlled excavation, would both confirm authenticity and double the material. On the language, the only realistic routes are a decipherment of Linear A, if Davis is right that the two share a language, or a longer disc-script text⁠[6]. Any new reading should be judged by Duhoux's checks and should publish its sign values and its treatment of all 61 groups so that others can test it⁠[3].