Early copper axes from mainland Greece, whether flat or shaft-hole, are rare. Only four are attributable with more or less certainty to the Final Neolithic period: two from Sesklo, one from Alepotrypa and one from Pevkakia. There is one from Crete that was found in a Late Neolithic level at Knossos. Three others might belong to Early Bronze I: a flat axe each from Gona and Marathon Cave, and a unique hammer-axe from Levadia. The three Mainland hoards, from Eutresis, Thebes, and Petralona, containing shaft-hole and flat axes, have been assigned to the latter half of the Early Bronze Age.