Phaistos Disk
The Phaistos Disk was discovered in Crete in 1908. In a century which has seen the cracking of Linear B, Ugaritic, and other orthographic systems, the Phaistos Disk has eluded decipherment. The disk is thought to date from around 1700 BC. It is a roundish disk of clay, with symbols stamped into it. The text consists of 61 words, 16 of which are accompanied by a mysterious "slash" mark.
Read More about Phaistos Disk