The Rosetta Stone is a document that was carved in 196 B.C. and honours the Pharoah of Egypt praising him for the good things he had done for the priests and people of Egypt. The document is in three languages - Greek, Hieroglyphic and Demotic.After many years of studying the Rosetta Stone and other examples of ancient Egyptian writing, Jean-François Champollion deciphered hieroglyphs in 1822.
the rosetta stone is an ancient Egyptian granodiorite stele inscribed with a decree issued at Memphis in 196 BC on behalf of King Ptolemy V. The decree appears in three scripts: the upper text is Ancient Egyptian hieroglyphs, the middle portion Demotic script, and the lowest Ancient Greek. Because it presents essentially the same text in all three scripts (with some minor differences among them), it provided the key to the modern understanding of Egyptian hieroglyphs.