The Phaistos Disc was Minoan and made in the 17th century BC. The clay disc with a diameter of just 15 centimeters guards its secret safely. Forty-five different symbols compose two groups on both sides of the disc, to a total of 241 symbols.
Its content has not revealed its meaning, even though several scholars tried to interpret it. Some think it is a religious text, a sort of prayer. Some believe that it narrates the Feats of Herakles, and others talk about a document on evolution and the human race. A prevailing opinion supports the documentation of an astrological-zodiac symbolism.