Throughout this period not a single seal seems to have been produced in mainland Greece or in the islands; the recent discovery of two clay cylinder seals on Aegina remains isolated and unparalleled (W. Gauss, R. Smetana, in Touchais 2010, 170–1). On Crete, on the contrary, the establishment of the palatial system brings with it, at the same time as the use of writing, a considerable resurgence of glyptic. The quantity of seals, the stylistic diversity, and the range of quality (material used, care and finesse of engraving) suggest that their users were numerous and did not come only from the elite. This could explain the diversity of local traditions, from the Mesara to east Crete.