The name of Rosetta Stone originated from a marble stone tablet made in 196 BC, translated as the Rosetta Stone. Discovered in 1799, the stone was inscribed with three versions of Egyptian King Ptolemy V’s Decree – in Ancient Egyptian using the hieroglyphic script and the demotic script, and in Ancient Greek. By comparing the similarities and differences among the three linguistic editions, modern archaeologists used the Rosetta Stone as the key to deciphering Egyptian hieroglyphs, which had been lost for over a thousand years. The Rosetta Stone thus became an important milestone in the study of ancient Egyptian history, and it was also the dawn of legal translation. In addition, the Rosetta Stone serves as a metaphor for a critical clue or tool that is used to solve a conundrum or mystery.